Researcher basic information

• Master of Science, The University of Tokyo, Mar. 1998
• Doctor of Science, The University of Tokyo, Mar. 2001

• https://researchmap.jp/HrsAoyama?lang=en

• https://jglobal.jst.go.jp/detail?JGLOBAL_ID=200901052088458239

• 200901052088458239

• 火山地震学
• 火山物理学
• Volcano Observation
• Volcano Eruption
• Infrasound
• Debris Flow
• Volcano Seismology
• Volcano Physics
• Volcano Monitoring

• Natural Science, Solid earth sciences, Volcano Physics, Volcano Erption, Volcano Monitoring, Eruption Prediction, Seismology, Hydrothermal Systems

• Bachelor's degree program, School of Science
• Master's degree program, Graduate School of Science
• Doctoral (PhD) degree program, Graduate School of Science

Research activity information

• May 2022, Volcanological Society of Japan, Best Paper Award
  The 2018 phreatic eruption at Mt. Motoshirane of Kusatsu–Shirane volcano, Japan: eruption and intrusion of hydrothermal fluid observed by a borehole tiltmeter network
  Akihiko Terada;Wataru Kanda;Yasuo Ogawa;Taishi Yamada;Mare Yamamoto;Takahiro Ohkura;Hiroshi Aoyama;Tomoki Tsutsui;Shin’ya Onizawa, Japan society, Japan, 12075895

• Numerical experiments of geyser eruption caused by ascent-driven decompression boiling, using the wellbore-reservoir simulator T2Well/ECO2N
  Ayuta Tsuge; Hiroshi Aoyama
  Journal of Volcanology and Geothermal Research, 465, 108366, 108366, Elsevier BV, Sep. 2025, [Peer-reviewed]
  English, Scientific journal
• Geophysical Observations of Kusatsu–Shirane Volcano: Conceptual Model of the Hydrothermal System as a Site of Phreatic Eruptions
  Akihiko Terada; Hiroshi Aoyama; Taishi Yamada; Mare Yamamoto
  Active Volcanoes of the World, 159, 184, Springer Nature Switzerland, 03 Jul. 2025, [Peer-reviewed]
  English, In book
• 水準測量による有珠山周辺の地盤変動観測
  平戸 悠登; 青山 裕; 鈴木 敦生; 岡田 和見; 保苅 健陽; 泉 那由多; 立石 悟; 筒井 優斗; 田中 良
  北海道大学地球物理学研究報告, 88, 53, 74, Mar. 2025
• The Onset, Middle, and Climax of Precursory Hydrothermal Intrusion of the 2018 Phreatic Eruption at Kusatsu‐Shirane Volcano
  Taishi Yamada; Akihiko Terada; Rina Noguchi; Wataru Kanda; Hideki Ueda; Hiroshi Aoyama; Takahiro Ohkura; Yasuo Ogawa; Toshikazu Tanada
  Journal of Geophysical Research: Solid Earth, 128, 11, American Geophysical Union (AGU), 27 Oct. 2023, [Peer-reviewed], [International Magazine]
  English, Scientific journal, Triggering intrusions of phreatic eruptions are often observed as seismic and ground deformation signals on a time scale of minutes. The current understanding of hydrothermal intrusions still needs improvement to obtain insight into the eruption scale from the observables. We examine local geophysical data from the precursory hydrothermal intrusion of the 2018 phreatic eruption of Kusatsu‐Shirane volcano. To achieve an integrated intrusion model, we divide analyzing time window into the onset, middle, and climax. Focusing on the transient response of tilt data for the sudden pressurization, we estimate a vertical tensile opening (1.7 × 10³ m³/s in 40 s) at 1.1 km depth for the intrusion onset. Pressurization can represent the start of vapourization. Very long period (VLP, 0.033–0.1 Hz) seismic signals are adopted to constrain the middle and climax phases. We obtained two sequential semi‐horizontal tensile crack oscillation sources with peak volume changes of 3.6 × 10⁴–1.9 × 10⁵ m³ at 0.3–0.6 km depths. The second VLP source acted as a final trigger of the eruption to cause depressurization in the shallow portion of the intruded region, which is constrained as having reached 0.1 km depth by surface deformation. Simultaneously, we find another depressurization originated from depth in the climax due to a decrease in the hydrothermal intrusion rate. Through comparison with the 2014 Ontake phreatic eruption, the total inflation volume may correlate with eruption scales. Intruded hydrothermal fluid and local structure characteristics also may have to be considered to evaluate the eruptions scales from inferred signal source intensity.
• 1999 年伊豆大島における人工地震探査 ─観測および初動走時データによる3 次元地震波速度構造─
  渡辺秀文; 鍵山恒臣; 坂下至功; 及川 純; 大湊隆雄; 小山悦郎; 辻 浩; 宗包浩志; 松下誠司; 萩原道徳; 竹田豊太郎; 長田 昇; 井本良子; 青山 裕; 浜田盛久; 趙 燕来; Mossa Hesham; 福満修一郎; 青木重樹; 藤原健治; 池田 靖; 加治屋秋実; 安藤 忍; 亀井 守; 古田雅和; 浅沼光輝; 佐藤勝良; 山賀一章; 石脇 誠; 広瀬淳司; 干場三寛; 福田 直; 坂 勝仁; 森 済; 勝俣 啓; 前川徳光; 岡田 弘; 田中 聡; 山脇輝夫; 仁田交市; 橋野弘憲; 野津憲治; Pedro A. Hernandez; 下池洋一; R. Noemi Lima; 野上健治; 平林順一; 鈴木 隆; 熊谷博之; 奥田 隆; 戸松稔貴; 河村 将; 松島 健; 栗山 都; 永野 一; 高木朗充; 筒井智樹; 須藤靖明; 吉川 慎; 吉川美由紀; John Macario Londono; 井口正人; 為栗 健; Janauar Herry Setiawan; 宮町宏樹; 平野舟一郎; 水原健太郎; 鶴我佳代子
  地震研究所彙報, 98, 1, 29, Oct. 2023, [Peer-reviewed]
  Japanese, Research institution
• Eruption dynamics and plumbing system of Shikabe Geyser in southern Hokkaido, Japan, revealed by field observation inside and outside the conduit
  Ayuta Tsuge; Hiroshi Aoyama; Kenji Nogami; Fujio Akita; Kazuhiko Kato
  Journal of Volcanology and Geothermal Research, 440, 107851, 107851, Elsevier BV, Aug. 2023, [Peer-reviewed], [International Magazine]
  Scientific journal, 39295209
• Magma-hydrothermal system of Kusatsu-Shirane volcano, Japan
  A Terada; W Kanda; Y Ogawa; T Yamada; M Yamamoto; H Aoyama; T Ohkura; T Ohba; M Yaguchi; H Sumino; T Obase
  PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2023, 68, 68, The Volcanological Society of Japan, 2023
  Japanese
• Leveling survey and predicted vertical deformation around Atosanupuri volcanic group, eastern Hokkaido
  Matsuda Mizuki; Ohzono Mako; Aoyama Hiroshi; Tanaka Ryo; Hirado Yuto; Okada Kazumi; Takahashi Hiroaki
  PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2023, 149, 149, The Volcanological Society of Japan, 2023
  Japanese
• Locating Volcanic Earthquakes and Tremors Using Delay Time and Amplitude Ratio Information from Cross-Correlation Functions
  Theodorus Permana; Hiroshi Aoyama
  Seismological Research Letters, 94, 2A, 871, 886, Seismological Society of America (SSA), 23 Nov. 2022, [Peer-reviewed], [Invited]
  English, Scientific journal, Abstract
  
  Volcanic tremors and earthquakes must be monitored to gain insights into volcanic activity. Localization of their sources is often challenging because of the unclear onset of seismic waves, particularly when the volcanic activity increases before and during an eruption. Existing alternative techniques to locate the seismic sources are based on the information on the spatial amplitude distribution or the travel-time difference of seismic waves. Exploring the idea of combining both information for source location determination, we propose a new location method that uses the amplitude and travel-time difference information obtained from the unnormalized cross correlations of seismic data. Evaluation using volcanic earthquakes that occurred in 2020 at Tokachidake volcano, Japan, reveals an improvement in location accuracy compared to existing methods using individual information. Analysis of an episode of volcanic tremors and earthquakes accompanying a rapid tilt change event on 14 September 2020 reveals that during the inflation of the crater area, reliable seismic source locations with an error of ≤1 km become more concentrated at around 0.6 km beneath the 62-2 crater, in which the most recent eruptive activity had occurred. Such changes in source locations are associated with the movement of volcanic gas and hot water from the hydrothermal system below. Our proposed method is useful for locating and monitoring seismic source locations corresponding to volcanic fluid movements.
• Multi-parametric Experiments on Infrasound Monitoring for Snow-Avalanche at Mt. Fuji
  IKEDA Wataru; ICHIHARA Mie; HONDA Ryo; AOYAMA Hiroshi; TAKAHASHI Hidetoshi; YOSHIMOTO Mitsuhiro; SAKAI Shin'ichi
  Journal of the Japanese Society of Snow and Ice, 84, 5, 421, 432, The Japanese Society of Snow and Ice, 15 Sep. 2022, [Peer-reviewed]
  Japanese, We tried infrasonic monitoring of snow avalanche at Mt. Fuji. We installed infrasound sensors, a thermometer-probe snow-depth meter, and seismometers for two winter seasons from 2018 to 2020 and made integrated analyses of their data. Although no significant snow avalanche event occurred during our observation, we found many infrasound waveforms similar to the reported snow avalanche infrasound. Because the infrasound events accompanied little seismic power, we inferred surface phenomena, if not necessarily snow avalanches, generated them. The events’ occurrences were concentrated during and right after snow-falls and during snow melting. The infrasonic array analyses of the 2019-2020 dataset exhibited most of the events are from the north slopes below the observation site. From the summit direction, continuous infrasonic noise was frequently detected, by which detecting events from there might have been difficult. This study has shown that the multi-parameter observation method is practical and useful in the severe environment of Mt. Fuji in winter. Also, it revealed the particular problems of infrasound observation at the huge volcanic edifice. We expect our results will help design future observations.
• 北海道の活火山における減災に向けた観測研究の取り組みー物理観測と物質科学の今後の連携を見据えてー
  青山 裕
  火山, 67, 2, 171, 193, 日本火山学会, 30 Jun. 2022, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
  Japanese, Scientific journal
• S-wave modelling of the Showa-Shinzan lava dome in Usu Volcano, Northern Japan, from seismic observations
  Akiko Takeo; Kiwamu Nishida; Hiroshi Aoyama; Motoko Ishise; Takeru Kai; Ryo Kurihara; Takuto Maeda; Yuta Mizutani; Yuki Nakashima; Shogo Nagahara; Xiaowen Wang; Lingling Ye; Takeshi Akuhara; Yosuke Aoki
  Geophysical Journal International, 230, 3, 1662, 1678, Oxford University Press (OUP), 19 May 2022, [Peer-reviewed], [International Magazine]
  English, Scientific journal
• The 2018 phreatic eruption at Mt. Motoshirane of Kusatsu–Shirane volcano, Japan: eruption and intrusion of hydrothermal fluid observed by a borehole tiltmeter network
  Akihiko Terada; Wataru Kanda; Yasuo Ogawa; Taishi Yamada; Mare Yamamoto; Takahiro Ohkura; Hiroshi Aoyama; Tomoki Tsutsui; Shin’ya Onizawa
  Earth, Planets and Space, 73, 1, 157, Springer Science and Business Media LLC, 30 Jun. 2021, [Peer-reviewed], [International Magazine]
  English, Scientific journal, We estimate the mass and energy budgets for the 2018 phreatic eruption of Mt. Motoshirane on Kusatsu–Shirane volcano, Japan, based on data obtained from a network of eight tiltmeters and weather radar echoes. The tilt records can be explained by a subvertical crack model. Small craters that were formed by previous eruptions are aligned WNW–ESE, which is consistent with the strike of the crack modeled in this study. The direction of maximum compressive stress in this region is horizontal and oriented WNW–ESE, allowing fluid to intrude from depth through a crack with this orientation. Based on the crack model, hypocenter distribution, and MT resistivity structure, we infer that fluid from a hydrothermal reservoir at a depth of 2 km below Kusatsu–Shirane volcano has repeatedly ascended through a pre-existing subvertical crack. The inflation and deflation volumes during the 2018 eruption are estimated to have been 5.1 × 10⁵ and 3.6 × 10⁵ m³, respectively, meaning that 1.5 × 10⁵ m³ of expanded volume formed underground. The total heat associated with the expanded volume is estimated to have been ≥ 10¹⁴ J, similar to or exceeding the annual heat released from Yugama Crater Lake of Mt. Shirane and that from the largest eruption during the past 130 year. Although the ejecta mass of the 2018 phreatic eruption was small, the eruption at Mt. Motoshirane was not negligible in terms of the energy budget of Kusatsu–Shirane volcano. A water mass of 0.1–2.0 × 10⁷ kg was discharged as a volcanic cloud, based on weather radar echoes, which is smaller than the mass associated with the deflation. We suggest that underground water acted as a buffer against the sudden intrusion of hydrothermal fluids, absorbing some of the fluid that ascended through the crack.
• 1950年代に雌阿寒岳山上で取得されたすす書き地震記録の再解析
  丹羽俊介; 青山 裕; 澤田可洋
  釧路市立博物館紀要, 39, 63, 75, Mar. 2021, [Corresponding author], [Domestic magazines]
  Japanese, Research institution
• Locating hydrothermal fluid injection of the 2018 phreatic eruption at Kusatsu-Shirane volcano with volcanic tremor amplitude
  Taishi Yamada; Aika Kurokawa; Akihiko Terada; Wataru Kanda; Hideki Ueda; Hiroshi Aoyama; Takahiro Ohkura; Yasuo Ogawa; Toshikazu Tanada
  Earth, Planets and Space, 73, 1, 14, Springer Science and Business Media LLC, 11 Jan. 2021, [Peer-reviewed]
  English, Scientific journal, Kusatsu-Shirane volcano hosts numerous thermal springs, fumaroles, and the crater lake of Yugama. Hence, it has been a particular study field for hydrothermal systems and phreatic eruptions. On 23 January 2018, a phreatic eruption occurred at the Motoshirane cone of Kusatsu-Shirane, where no considerable volcanic activity had been reported in observational and historical records. To understand the eruption process of this unique event, we analyzed seismic, tilt, and infrasound records. The onset of surface activity accompanied by infrasound signal was preceded by volcanic tremor and inflation of the volcano for ~ 2 min. Tremor signals with a frequency band of 5–20 Hz remarkably coincide with the rapid inflation. We apply an amplitude source location method to seismic signals in the 5–20 Hz band to estimate tremor source locations. Our analysis locates tremor sources at 1 km north of Motoshirane and at a depth of 0.5–1 km from the surface. Inferred source locations correspond to a conductive layer of impermeable cap-rock estimated by magnetotelluric investigations. An upper portion of the seismogenic region suggests hydrothermal activity hosted beneath the cap-rock. Examined seismic signals in the 5–20 Hz band are typically excited by volcano-tectonic events with faulting mechanism. Based on the above characteristics and background, we interpret that excitation of examined volcanic tremor reflects small shear fractures induced by sudden hydrothermal fluid injection to the cap-rock layer. The horizontal distance of 1 km between inferred tremor sources and Motoshirane implies lateral migration of the hydrothermal fluid, although direct evidence is not available. Kusatsu-Shirane has exhibited unrest at the Yugama lake since 2014. However, the inferred tremor source locations do not overlap active seismicity beneath Yugama. Therefore, our result suggests that the 2018 eruption was triggered by hydrothermal fluid injection through a different pathway from that has driven unrest activities at Yugama.
• Focal mechanisms and the stress field in the aftershock area of the 2018 Hokkaido Eastern Iburi earthquake (MJMA = 6.7)
  Yuki Susukida; Kei Katsumata; Masayoshi Ichiyanagi; Mako Ohzono; Hiroshi Aoyama; Ryo Tanaka; Masamitsu Takada; Teruhiro Yamaguchi; Kazumi Okada; Hiroaki Takahashi; Shin’ichi Sakai; Satoshi Matsumoto; Tomomi Okada; Toru Matsuzawa; Hiroki Miyamachi; Shuichiro Hirano; Yoshiko Yamanaka; Shinichiro Horikawa; Masahiro Kosuga; Hiroshi Katao; Yoshihisa Iio; Airi Nagaoka; Noriko Tsumura; Tomotake Ueno
  Earth, Planets and Space, 73, 1, Springer Science and Business Media LLC, 01 Jan. 2021, [Peer-reviewed]
  English, Scientific journal, The tectonic stress field was investigated in and around the aftershock area of the Hokkaido Eastern Iburi earthquake (M_JMA = 6.7) occurred on 6 September 2018. We deployed 26 temporary seismic stations in the aftershock area for approximately 2 months and located 1785 aftershocks precisely. Among these aftershocks, 894 focal mechanism solutions were determined using the first-motion polarity of P wave from the temporary observation and the permanent seismic networks of Hokkaido University, Japan Meteorological Agency (JMA), and High Sensitivity Seismograph Network Japan (Hi-net). We found that (1) the reverse faulting and the strike-slip faulting are dominant in the aftershock area, (2) the average trend of P- and T-axes is 78° ± 33° and 352° ± 51°, respectively, and (3) the average plunge of P- and T-axes is 25° ± 16° and 44° ± 20°, respectively: the P-axis is close to be horizontal and the T-axis is more vertical than the average of the P-axes. We applied a stress inversion method to the focal mechanism solutions to estimate a stress field in the aftershock area. As a result, we found that the reverse fault type stress field is dominant in the aftershock area. An axis of the maximum principal stress (σ₁) has the trend of 72° ± 7° and the dipping eastward of 19° ± 4° and an axis of the intermediate principal stress (σ₂) has the trend of 131° ± 73° and the dipping southward of 10° ± 9°, indicating that both of σ₁- and σ₂-axes are close to be horizontal. An axis of the minimum principal stress (σ₃) has the dipping westward of 67° ± 6° that is close to be vertical. The results strongly suggest that the reverse-fault-type stress field is predominant as an average over the aftershock area which is in the western boundary of the Hidaka Collision Zone. The average of the stress ratio R = (σ₁ − σ₂)/(σ₁ − σ₃) is 0.61 ± 0.13 in the whole aftershock area. Although not statistically significant, we suggest that R decreases systematically as the depth is getting deep, which is modeled by a quadratic polynomial of depth.
• Active Seismic Source Experiment in Sakurajima Volcano in 2019 and Comparison with the Previous Experiments
  NAKAMICHI, Haruhisa; YAMAMOTO, Keigo; YAMADA, Taishi; TAMEGURI, Takeshi; TAKAHASHI, Kousuke; AOYAMA, Hiroshi; YAMAMOTO, Mare; NOGAMI, Kenji; OIKAWA, Jun; MAEDA, Yuta; OHKURA, Takahiro; MATSUSHIMA, Takeshi; YAKIWARA, Hiroshi; SUGAHARA, Michitomo; TSUKAMOTO, Kaori; KISHIMOTO, Hiroshi; KUDO, Naoki; YAMAMURA, Takuya; HIRAHARA, Satoshi; YAGI, Takeo; HORIKAWA, Shinichiro; YOSHIKAWA, Shin; SONODA, Tadaomi; NAKATANI, Yukihiro; HIRANO, Shuichiro; MIYAMACHI, Hiroki; TANAKA, Yuki; YOSHIDA, Hideomi; NISHIKAWA, Sora; KAI, Takeru; TAKAHASHI, Ryuhei; TANOUE, Kazushi; KAWABE, Satoshi; WAKABAYASHI, Tamaki; MURAMATSU, Dan; HASHIMOTO, Tasuku; OSUGA, Keishi
  Disaster Prevention Research Institute Annuals. B, 63, B, 100, 107, 京都大学防災研究所, Dec. 2020
  Japanese, Research institution, We conducted an active seismic experiment in Sakurajima volcano in December 2019, three years after the similar experiment that was conducted in 2016. We deployed 185 temporary seismic stations, most of which were installed at the same place as in 2013 and 2016. Eight and two explosive shots with 20 and 100 kg charges, respectively, were detonated in December 5, 2019. The 2019 shot locations differ from 0.4 to 12 m from the corresponding previous shot locations. We successively observed the all explosions during nighttime nine hours continuous recording. We examine reflection phases on the seismic records that obtained by the previous and 2019 experiment to detect temporal change of subsurface seismic structure beneath Sakurajima volcano.
• Seismic and geodetic monitoring near the active crater at Tokachidake volcano (preliminary report)
  Aoyama Hiroshi; Tanaka Ryo; Hashimoto Takeshi; Murakami Makoto; Narita Shohei
  Geophysical bulletin of Hokkaido University, 83, 83, 25, 48, 北海道大学大学院理学研究院, 19 Mar. 2020, [Lead author, Corresponding author], [Domestic magazines]
  Japanese, Research institution
• Three-dimensional reconstruction of topography model of Tarumae lava dome using UAV (unmanned aerial vehicles)
  Kudo Chisato; Aoyama Hiroshi; Tanaka Ryo
  Geophysical bulletin of Hokkaido University, 83, 103, 114, 北海道大学大学院理学研究院, 19 Mar. 2020, [Domestic magazines]
  Research institution
• Multi-parameter observations at Shikabe Geyser, and unique changes in interval between eruptions (preliminary report)
  Tsuge Ayuta; Aoyama Hiroshi
  Geophysical bulletin of Hokkaido University, 83, 49, 70, 19 Mar. 2020, [Last author], [Domestic magazines]
  Research institution
• Significance of Electromagnetic Surveys at Active Volcanoes: Toward Evaluating the Imminence of Wet Eruptions
  T. Hashimoto; W. Kanda; Y. Morita; M. Hayakawa; R. Tanaka; H. Aoyama; M. Uyeshima
  Journal of Disaster Research, 14, 4, 580, 591, Jun. 2019, [Peer-reviewed]
  English, Scientific journal
• The 2018 Hokkaido Eastern Iburi earthquake (MJMA = 6.7) was triggerd by a strike-slip faulting in a stepover segment: insights from the aftershock distribution and the focal mechanism sokution of the main shock
  K. Katsumata; M. Ichiyanagi; M. Ohzono; H. Aoyama; R. Tanaka; M. Takada; T. Yamaguchi; K. Okada; H. Takahashi; S. Sakai; S. Matsumoto; T. Okada; T. Matsuzawa; S. Hirano; T. Terakawa; S. Horikawa; M. Kosuga; H. Katao; Y. Iio; A. Nagaoka; N. Tsumura; T. Ueno; the Group for the Aftershock Observations of the 2018 Hokkaido Eastern Iburi Earthquake
  Earth Planets Space, 71, 53, May 2019, [Peer-reviewed]
  English, Scientific journal
• Gas flux cyclic regime at an open vent magmatic column inferred from seismic and acoustic records
  Gen Kondo; Hiroshi Aoyama; Takeshi Nishimura; Maurizio Ripepe; Giorgio Lacanna; Riccardo Genco; Ryohei Kawaguchi; Taishi Yamada; Takahiro Miwa; Eisuke Fujita
  Scientific Reports, 9, 1, Springer Science and Business Media LLC, Apr. 2019, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Tiltmerer observation in Avachinsky volcano, Kamchatka, Russia
  Hiroaki TAKAHASHI; Hiroshi AOYAMA; Mako OHZONO; Ryo TANAKA; Chihiro ITO; Saki WATANABE; Takeshi MATSUSHIMA; Yusuke YAMASHITA; Hiroki MIYAMACHI; Satoshi OKUYAMA; EEvgeny GORDEEV; Yarosrav MURAVYEV; Kirill MAGUSKIN; Natalia MALIK; Ivan MINOROV; Danila CHEBROV
  Geophysical Bulletin of Hokkaido University, 82, 11, 18, Mar. 2019
  Japanese
• Relationship between infrasound-derived and buoyancy-derived eruption plume volume estimates
  Taishi Yamada; Hiroshi Aoyama; Hideki Ueda
  Bulletin of Volcanology, 80, 9, 71, Springer Science and Business Media {LLC}, Sep. 2018, [Peer-reviewed]
  English, Scientific journal
• Azimuth Estimations From a Small Aperture Infrasonic Array: Test Observations at Stromboli Volcano, Italy
  K. Yamakawa; M. Ichihara; K. Ishii; H. Aoyama; T. Nishimura; M. Ripepe
  Geophysical Research Letters, 45, 17, 8931, 8938, American Geophysical Union (AGU), Aug. 2018, [Peer-reviewed]
  English, Scientific journal
• Importance of multi-disciplinary monitoring during inter-eruptive periods -A case study from Mt.Tarumae-
  Takeshi Hashimoto; Hiroshi Aoyama; Hiroshi Koyama; Atsushi Morii; Wataru Mishima; Tagiru Ogino; Ryo Takahashi; Noritoshi Okazaki
  Monthly Chikyu, 40, 3, 163, 169, Mar. 2018
  Japanese
• Intrinsic and scattering attenuation images of Usu volcano, Japan
  J. Prudencio; T. Taira; Y. Aoki; H. Aoyama; S. Onizawa
  BULLETIN OF VOLCANOLOGY, 79, 4, 29, Apr. 2017, [Peer-reviewed]
  English, Scientific journal
• 全磁力観測：火山体内部構造・熱水流動系のモデル化と火山活動度評価手法の高度化（十勝岳）
  橋本武志; 青山 裕; 田中 良
  北海道地質研究所調査研究報告, 44, 105, 111, Mar. 2017
  Japanese
• Importance of multi-parameter monitoring during non-eruptive stage (an example from Mt. Tarumae)
  Hashimoto T.; Matsumoto M.; Aoyama H.; Koyama H.; Morii A.; Mishima W.; Ogino T.; Takahashi R.; Okazaki N.
  PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2017, 36, 36, The Volcanological Society of Japan, 2017
  Japanese
• Volcanic eruption volume flux estimations from very long period infrasound signals
  Taishi Yamada; Hiroshi Aoyama; Takeshi Nishimura; Masato Iguchi; Muhamad Hendrasto
  GEOPHYSICAL RESEARCH LETTERS, 44, 1, 143, 151, Jan. 2017, [Peer-reviewed]
  English, Scientific journal
• Initial phases of explosion earthquakes accompanying Vulcanian eruptions at Lokon-Empung volcano, Indonesia
  Taishi Yamada; Hiroshi Aoyama; Takeshi Nishimura; Hiroshi Yakiwara; Haruhisa Nakamichi; Jun Oikawa; Masato Iguchi; Muhamad Hendrasto; Yasa Suparman
  JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 327, 310, 321, Nov. 2016, [Peer-reviewed]
  English, Scientific journal
• Magnitude-frequency distribution of volcanic explosion earthquakes
  Takeshi Nishimura; Masato Iguchi; Mohammad Hendrasto; Hiroshi Aoyama; Taishi Yamada; Maurizio Ripepe; Riccardo Genco
  EARTH PLANETS AND SPACE, 68, 125, Jul. 2016, [Peer-reviewed]
  English, Scientific journal
• Eruption Process Inferred from Multi-parameter Geophysical Observations(＜Special Section＞The 60th Anniversary of VSJ "Latest Advances and Future Perspectives in Volcanology")
  NAKAMICHI Haruhisa; AOYAMA Hiroshi
  BULLETIN OF THE VOLCANOLOGICAL SOCIETY OF JAPAN, 61, 1, 119, 154, The Volcanological Society of Japan, Mar. 2016, [Peer-reviewed]
  Japanese, Scientific journal, This paper reviews the eruption processes, as well as the processes leading up to the eruption, as revealed by multi-parameter geophysical observations. First, we briefly describe the history and development of geophysical observational methods in Japan. A prototype of multi-parameter geophysical observation had already been established at a few volcanoes in Japan 50 years ago. To obtain high-quality geophysical data, underground tunnels and boreholes had been constructed around volcanoes, and seismometers, tiltmeters, and strainmeters had been installed in them during the 1980s and 1990s. Broadband seismometers and a data logger with a GPS clock that are small and lightweight, were introduced in the mid-1990s. Combined with large data storage capacity in the data loggers and efficient data transmission using IP protocols, simultaneous multi-parameter geophysical observations have been intensively and continuously conducted since the early 2000s in order to reveal the eruption processes. Since then, various analysis methods suitable for multi-parameter observations have been developed. Although the time scales of volcanic eruptions vary widely, from several seconds to several decades, most of these scales are covered by multi-parameter geophysical observation. We review the advances and challenges for understanding not only the eruption processes, but also the precursory processes leading up to eruptions, which have been revealed by multi-parameter geophysical observations during the past decade. The explosive eruption processes, which include Plinian, Vulcanian, and Strombolian eruptions, and effusive eruptions, which include Hawaiian and dome-forming eruptions, are also reviewed. Physical models for these types of eruptions have been developed experimentally and theoretically, and examined later using geophysical observations. For each type of eruption, we briefly introduce the proposed physical models and describe their progress, mainly from the viewpoint of multi-parameter geophysical observations. The eruption processes of Plinian eruptions have been revealed mainly by worldwide seismic and infrasound observation networks and satellite images. Vulcanian and Strombolian eruptions are most intensively studied by multi-parameter geophysical observations, because of their high-frequency nature and accessibility to the proximity of active craters in deploying monitoring instruments. For example, the precursory processes of Vulcanian eruptions are characterized by inflation, relatively stable, and slight deflation stages of the volcano edifices, which are inferred by continuous crustal deformation measurements. Strombolian eruptions are understood as repeating strong gas bursts at the surface of liquid magma. Recently, new monitoring techniques such as high-speed cameras and portable radar units have been introduced to observe the Strombolian surface activities. Hawaiian eruptions are characterized by explosive lava fountains and large lava flows traveling more than several kilometers. Multi-parameter observations are quite useful for monitoring the locations of dike intrusions and lava fountains. Dome-forming eruptions have the longest time-scales among these eruption styles. Temporal fluctuations of dome growth are well monitored by geodetic and photogrammetric observations. Recent seismic observations of dome-forming have revealed the characteristic repeating earthquakes and provided new insights into the physical mechanisms of dome growth. Our understanding of the physical process of phreatic eruptions is quite limited relative to magmatic eruptions. Recently, tilt changes associated with tremors were sometimes observed before phreatic eruptions at several volcanoes, and may be forerunners of phreatic eruptions. We need much more data to understand the processes leading up to phreatic eruptions. Erupted volumes and rates are inferred from multi-parameter geophysical
• Precursory tilt changes of small phreatic eruptions of Meakan-dake volcano, Hokkaido, Japan, in November 2008
  Hiroshi Aoyama; Hiromitsu Oshima
  EARTH PLANETS AND SPACE, 67, 119, Jul. 2015, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Mechanism of small vulcanian eruptions at Suwanosejima volcano, Japan, as inferred from precursor inflations and tremor signals
  Takeshi Nishimura; Masato Iguchi; Hiroshi Yakiwara; Jun Oikawa; Ryohei Kawaguchi; Hiroshi Aoyama; Haruhisa Nakamichi; Yusaku Ohta; Takeshi Tameguri
  BULLETIN OF VOLCANOLOGY, 75, 12, 779, Dec. 2013, [Peer-reviewed]
  English, Scientific journal
• Seismic Array Observation Close to the Active Crater at Suwanose-jima Volcano, Southwest Japan for the Period from October to November 2010
  NAKAMICHI HARUHISA; AOYAMA HIROSHI; NISHIMURA TAKESHI; YAKIWARA HIROSHI; OTA YUSAKU; YOKOO AKIHIKO; IGUCHI MASATO
  京都大学防災研究所年報(CD-ROM), 56, 227, 235, 京都大学防災研究所, 2012
  Japanese, Research institution, We conducted a small-aperture seismic array observation at Suwanose-jima volcano for the period from 1 October to 18 November 2010. The seismic array consists of 13 elements of short-period seismometers and 5 data loggers. We perform array analysis for continuous seismic records observed during this period to investigate the wave-field properties of several episodes of volcanic tremors and 30 explosion earthquakes. Averages of the slowness values and back azimuths of volcanic tremors are estimated to be 0.8-1.4 s/km and 0°-40°, respectively. This suggests that the tremor wave consists of body and surface waves that propagate from the active crater. The array analyses and particle motions of explosion earthquakes indicate that the initial parts of the waveforms of explosion earthquakes are S waves that come from the direction of the active crater. The slowness values of the S waves of the explosion earthquakes are 0.3-0.5 s/km. Variation of the slowness value reflects the depth change of the explosion sources.
• The Repeated Seismic Survey 2010 in Sakurajima Volcano, South Kyushu, Japan(The 2nd Round)
  TSUTSUI Tomoki; TAMEGURI Takeshi; IGUCHI Masato; OIKAWA Jun; OSHIMA Hiromitsu; MAEKAWA Tokumitsu; AOYAMA Hiroshi; UEKI Sadato; HIRAHARA Satoshi; NOGAMI Kenji; OHMINATO Takao; ICHIHARA Mie; TSUJI Hiroshi; HORIKAWA Shinichiro; OKUDA Takashi; SHIMIZU Hiroshi; MATSUSHIMA Takeshi; OHKURA Takahiro; YOSHIKAWA Shin; SONODA Tadaomi; MIYAMACHI Hiroki; YAKIWARA Hiroshi; HIRANO Shuichiro; SAITO Koichiro; SUEMINE Koichi; GOTO Susumu; IKEGAME Takamitsu; KATO Koji; MATSUSUE Shinichi; KOHNO Taisuke; UTSUNOMIYA Shingo; GOTO Hirohito; WATANABE Ryuichi; MAEHARA Yuki; SATOH Izumi; OYABU Ryudo; SHIMIZU Hidehiko; YAMASHITA Yusuke
  Annuals, Disaster Prevention Research Institute, Kyoto University, 54B, 54, 195, 208, 京都大学防災研究所, 2010
  Japanese, The second round of the repetitive seismic experiment was carried out on ecember 2010 in Sakurajima Volcano after an inflation period in June. The temporary seismic network was reconstructed well for the 2009's network within 0.1m northward and 0.2m eastward in the average. The data acquisition was successful in 245 of the 248 deployed stations. The amplitude variation ranged within 0.8 to 1.5 times of the 2009's data and the travel time differences were less than 8ms. The reproduction of the waveform was also successful. The residual seismograms were made and include variation of the phase appearance with referring to the 2009's seismogram at the corresponding station. Most of the variations are found around 1.5 to 3 seconds of the residual seismograms.
• Inter-eruptive volcanism at Usu volcano: Micro-earthquakes and dome subsidence
  Hiroshi Aoyama; Shin'ya Onizawa; Tomokadu Kobayashi; Takeshi Tameguri; Takeshi Hashimoto; Hiromitsu Oshima; Hitoshi Y. Mori
  JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 187, 3-4, 203, 217, Nov. 2009, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• P-wave velocity structure beneath Asama Volcano, Japan, inferred from active source seismic experiment
  Yosuke Aoki; Minoru Takeo; Hiroshi Aoyama; Jun Fujimatsu; Satoshi Matsumoto; Hiroki Miyamachi; Haruhisa Nakamichi; Takahiro Ohkura; Takao Ohminato; Jun Oikawa; Rie Tanada; Tomoki Tsutsui; Keigo Yamamoto; Mare Yamamoto; Hitoshi Yamasato; Teruo Yamawaki
  JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 187, 3-4, 272, 277, Nov. 2009, [Peer-reviewed]
  English, Scientific journal
• Japanese University Joint Dense Seismic Observation on and around Mt. Asama Volcano (July 2005-July 2007)
  TAKEO Minoru; AOKI Yosuke; OHMINATO Takao; URABE Taku; OIKAWA Jun; TSUJI Hiroshi; KOYAMA Etsuro; OSADA Noboru; OSHIMA Hiromitsu; AOYAMA Hiroshi; MAEKAWA Tokumitsu; SUZUKI Atsuo; TANAKA Satoshi; ISHIHARA Yoshiaki; YAMAMOTO Mare; YAMADA Mamoru; OKURA Takahiro; INOUE Hiroyuki; IGUCHI Masato; TAMEGURI Takeshi; UEHIRA Kenji; NAKAMOTO Masami; HIRANO Shuichiro
  Bulletin of the Earthquake Research Institute, University of Tokyo, 84, 1, 1, 37, Jul. 2009, [Peer-reviewed]
  Japanese, Research institution
• Basement structure of Hokkaido Komagatake Volcano, Japan, as revealed by artificial seismic survey
  Shin'ya Onizawa; Hiromitsu Oshima; Hiroshi Aoyama; Tokumitsu Maekawa; Atsuo Suzuki; Hiroki Miyamachi; Tomoki Tsutsui; Takeshi Matsushima; Satoru Tanaka; Jun Oikawa; Norimichi Matsuwo; Keigo Yamamoto; Toru Shiga; Takehiko Mori
  JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 183, 3-4, 245, 253, Jun. 2009, [Peer-reviewed]
  English, Scientific journal
• Airwaves generated by an underwater explosion: Implications for volcanic infrasound
  M. Ichihara; M. Ripepe; A. Goto; H. Oshima; H. Aoyama; M. Iguchi; K. Tanaka; H. Taniguchi
  Journal of Geophysical Research, 114, B3, B03210, American Geophysical Union ({AGU}), 26 Mar. 2009, [Peer-reviewed]
  English, Scientific journal
• Possibility of sediment movement monitoring by continuous observation of noncontact sensor
  OGAWA Tatsunori; SASAKI Hisashi; NOWA Yukinori; AOYAMA Hiroshi
  Journal of the Japan Society of Erosion Control Engineering, 61, 6, 27, 30, Japan Society of Erosion Control Engineering, Mar. 2009, [Peer-reviewed]
  Japanese, Scientific journal
• Tilt change recorded by broadband seismometer prior to small phreatic explosion of Meakan-dake volcano, Hokkaido, Japan
  Hiroshi Aoyama; Hiromitsu Oshima
  GEOPHYSICAL RESEARCH LETTERS, 35, 6, L06307, Mar. 2008, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Simplified test on tilt response of CMG40T seismometers
  H. Aoyama
  Bulletin of Volcanological Society of Japan, 53, 1, 35, 46, Volcanological Society of Japan, 28 Feb. 2008, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, Deformation under the ground excites not only translational motion but also tilt changes, although seismologists usually analyze recorded waveforms under an assumption that seismogram only expresses translational motion. Since broadband seismometers have high enough sensitivity to tilt changes, the seismograms are sometimes contaminated by tilting motion at a seismic station. To check the effect of tilt change on seismogram recorded by a broadband velocity seismometer, we performed a simple experiment with a CMG40T seismometer and a tilt sensor of surface mount type. Tilt changes yield one-sided oscillation of the pendulums in a horizontal transducer. Such particular oscillation is clearly identified in the displacement trace calculated from the original velocity seismogram. Theoretical consideration predicts that slow temporal changes in tilt angle correlate with a time function of the apparent displacement of seismogram. Since results of our experiment well agree with the prediction, we estimate the conversion coefficient from the apparent displacement to tilt angle and confirm that the coefficient obtained experimentally well corresponds with the value from theoretical prediction. As a possible example in an active volcano, we consider slow isotropic volume change near a seismic station and calculate synthetic seismogram due to the volume change.
• Active Source Seismic Experiment in Asama Volcano, Japan: The Outline of the Experiment and First Arrival Times
  AOKI Y; TAKEO M; TSUJI H; KOYAMA E; AOYAMA H; FUJIMATSU J; MATSUMOTO S; MIYAMACHI H; NAKAMICHI H; OHKURA T; OHMINATO T; OIKAWA J; TANADA R; TSUTSUI T; YAMAMOTO K; YAMAMOTO M; YAMASATO H; YAMAWAKI T; ICHIHARA M; IMOTO Y; KAZAMA T; KOYAMA T; MAEDA Y; MAENO F; MORITA Y; NAKADA S; NAKAMURA S; OSADA N; WATANABE H; ALANIS P.K.B; ANGGONO T; FUJIWARA Y; FUKUYAMA Y; HAGIWARA S; HASHIMOTO T; HIRANO S; HORIGUCHI K; IIJIMA S; ISHIHARA Y; ISHIKAWA K; ISHIZAKA K; KITAWAKI Y; KUROKI H; KUSANO F; MAEKAWA T; MASUDA Y; MATSUMURA T; NAKAMOTO M; NISHIMURA T; NOGAMI K; OKUDA T; SAKAI T; SATO M; SUZUKI A; TANGE G; UEKI S; WATANABE A; YAKIWARA H; YAMAZAKI Y; YOSHIKAWA S
  Bulletin of the Earthquake Research Institute, University of Tokyo, 83, 1, 1, 26, 東京大学地震研究所, Jan. 2008, [Peer-reviewed]
  Japanese, Research institution, application/pdf
• Time-dependent model for volume changes in pressure sources at Asama volcano, central Japan due to vertical deformations detected by precise leveling during 1902-2005
  Masayuki Murase; Koji Ono; Takeo Ito; Rikio Miyajima; Hitoshi Mori; Hiroshi Aoyama; Hiromitu Oshima; Yuka Yoshida; Akihiko Terada; Eturo Koyama; Toyotarou Takeda; Hidefumi Watanabe; Fumiaki Kimata; Naoyuki Fujii
  JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 164, 1-2, 54, 75, Jul. 2007, [Peer-reviewed]
  English, Scientific journal
• 臨時稠密地震観測で見えてきた有珠山の微小地震活動
  青山 裕; 鬼澤真也; 為栗 健; 鈴木敦生; 前川徳光; 大島弘光; 森 濟; 橋本武志; 志賀 透; 小山 寛; 中橋正樹; 吉川章文; 福山由朗
  北海道大学地球物理学研究報告, 70, 107, 121, Mar. 2007, [Lead author, Corresponding author]
  Japanese
• P-wave velocity structure of Usu volcano: Implication of structural controls on magma movements and eruption locations
  Shin'ya Onizawa; Hiromitsu Oshima; Hiroshi Aoyama; Hitoshi Y. Mori; Tokumitsu Maekawa; Atsuo Suzuki; Tomoki Tsutsui; Norimichi Matsuwo; Jun Oikawa; Takao Ohminato; Keigo Yamamoto; Takehiko Mori; Taka' aki Taira; Hiroki Miyamachi; Hiromu Okada
  JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 160, 1-2, 175, 194, Feb. 2007, [Peer-reviewed]
  English, Scientific journal
• Micro-earthquake activity at Usu volcano revealed by temporary dense observation
  Hiroshi Aoyama; Shin'ya Onizawa; Takeshi Tameguri; Atsuo Suzuki; Tokumitsu Maekawa; Hiromitsu Oshima; Hitoshi Mori; Takeshi Hashimoto; Toru Shiga; Hiroshi Koyama; Masaki Nakahashi; Akifumi Yoshikawa; Yoshirou Fukuyama
  Journal of the Hokkaido University, Faculty of Science, Series VII: Geophysics, 70, 107, 121, 2007
  Japanese, Scientific journal
• Japanese university joint dense seismic observation on and around Fuji volcano (September 2002-April 2005)
  Watanabe Hidefumi; Nakamichi Haruhisa; Ohminato Takao; Kagiyama Tsuneomi; Oikawa Jun; Aoki Yosuke; Tsuji Hiroshi; Koyama Etsurou; Osada Noboru; Hagiwara Michinori; Takeda Toyotarou; Kobayashi Masakatsu; Oshima Hiromitsu; Aoyama Hiroshi; Maekawa Tokumitsu; Suzuki Atsuo; Tanaka Satoshi; Nishimura Takeshi; Nita Kouichi; Yamazaki Jun; Okuda Takashi; Yamada Mamoru; Okura Takahiro; Sudo Yasuaki; Yoshikawa Shin; Iguchi Masato; Shimizu Hiroshi; Uehira Kenji; Matsushima Ken; Yakiwara Hiroshi; Hirano Shuichiro
  Bulletin of the Earthquake Research Institute,University of Tokyo, 82, 3, 195, 207, The University of Tokyo, 2007, [Peer-reviewed]
  Japanese, Research institution, A joint dense seismic observation experiment was conducted during the period of September 2002～April 2005 in cooperation of researchers of national universities under the national project for prediction of volcanic eruption. Major objectives include seismic exploration of the subsurface structure of Fuji volcano and surrounding area as well as array observation of deep low frequency earthquakes, the activity of which increased in 2000－2001 beneath the volcano. We installed 28 seismographs temporarily on and around Fuji volcano and the data was transmitted to the Volcano Research Center (VRC), Earthquake Research Institute by satellite, radio and cable telemetry systems. We further collected seismic data of permanent stations around Fuji volcano operated by related research institutions. All the data was collected and picked at VRC. In this initial report we describe the brief outline of the joint experiment, and summarize the preliminary results of analyses on the seismic velocity structure of Fuji volcano and wave characteristics of a low frequency earthquake, which occurred on 11 September 2003.
• Weak glow at Tarumae volcano, Japan, witnessed by the high-sensitive camera soon after the Tokachi-oki Earthquake in 2003(MJMA 8.0)
  TERADA Akihiko; NAKAGAWA Mitsuhiro; OSHIMA Hiromitsu; AOYAMA Hiroshi; KAMIYAMA Hiroyuki
  Bulletin of the Earthquake Research Institute, University of Tokyo, 79, 1/2, 17, 26, Nov. 2004, [Peer-reviewed]
  Japanese, Research institution
• Recent seismic activities at active volcanoes in Hokkaido - Hokkaido Komagatake -
  AOYAMA Hiroshi; OSHIMA Hiromitsu; SUZUKI Atsuo; MAEKAWA Tokumitsu; ONIZAWA Shin'ya
  Geophysical Bulletin of Hokkaido University, 67, 67, 89, 109, 北海道大学大学院理学研究科地球惑星科学専攻（地球物理学）, Mar. 2004, [Lead author, Corresponding author]
  Japanese
• Recent seismic activities at active volcanoes in Hokkaido -Tarumaesan-
  AOYAMA Hiroshi; OSHIMA Hiromitsu; SUZUKI Atsuo; MAEKAWA Tokumitsu
  Geophysical Bulletin of Hokkaido University, 67, 67, 111, 129, 北海道大学大学院理学研究科地球惑星科学専攻（地球物理学）, Mar. 2004, [Lead author, Corresponding author]
  Japanese
• Recent seismic activities at active volcanoes in Hokkaido -Tokachi-dake-
  AOYAMA Hiroshi; OSHIMA Hiromitsu; SUZUKI Atsuo; MAEKAWA Tokumitsu
  Geophysical Bulletin of Hokkaido University, 67, 67, 131, 136, 北海道大学大学院理学研究科地球惑星科学専攻（地球物理学）, Mar. 2004, [Lead author, Corresponding author]
  Japanese
• Seismic exploration at Usu volcano with active sources - The outline of the experiment and the first arrival time data -
  ONIZAWA Shin'ya; OSHIMA Hiromitsu; AOYAMA Hiroshi; MORI Hitoshi Y; MAEKAWA Tokumitsu; SUZUKI Atsuo; OKADA Hiromu; TSUTSUI Tomoki; MATSUWO Norimichi; OIKAWA Jun; OHMINATO Takao; YAMAMOTO Keigo; MORI Takehiko; TAIRA Takaaki; MIYAMACHI Hiroki; KOYAMA Junji; YOMOGIDA Kiyoshi; WATANABE Kenji; MATSUBARA Wakana; OKADA Jun; MIYAMURA Jun'ichi; TANIGUCHI Masami; YOSHIKAWA Akifumi; KATOH Kouji; HAMAGUCHI Hiroyuki; TANAKA Satoru; YAMAZAKI Jun; FUJISAWA Hiroatsu; OGAWA Yasuo; NOGAMI Kenji; SAITOH Akira; MIZUHASHI Shoei; WATANABE Hidefumi; KAGIYAMA Tsuneomi; HAGIWARA Michinori; NAKAMICHI Haruhisa; OSADA Noboru; KOYAMA Etsuro; IMOTO Yoshiko; KOBAYASHI Tomokatsu; HIYAMA Youhei; SUGIOKA Manabu; ISHIMINE Yasuhiro; YAMAOKA Kousyun; OKUDA Takashi; KOIKE Katsuhiko; SUZUKI Takayuki; TSURUGA Kayoko; SHIMIZU Hiroshi; MATSUMOTO Satoshi; MATSUMOTO Kaoru; OHKURA Takahiro; SAKO Mikio; YOSHIKAWA Shin; YAKIWARA Hiroshi; HIRANO Shuichiro; HAYASHIMOTO Naoki; TAMEGURI Takeshi
  Bulletin of the Earthquake Research Institute, University of Tokyo, 78, 2, 121, 143, Sep. 2003, [Peer-reviewed]
  Japanese, Research institution
• The Meteorological Measurements above the Volcanoes Using the Helicopters : Application to the Quantitative Analysis for Volcanic Clouds
  Terada Akihiko; Okada Hiromu; Itabashi Nobuaki; Kato Koji; Koyama Hiroshi
  PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2003, 1, 1, The Volcanological Society of Japan, 2003
  Japanese
• Distribution of Hypocenters and Focal Mechanisms in and around the Hidaka Arc-Arc Collision Zone Revealed by a Dense Temporary Seismic Network
  KATSUMATA Kei; WADA Naoto; KASAHARA Minoru; OKAYAMA Muneo; ICHIYANAGI Masayoshi; ISHIKAWA Haruyoshi; TAKADA Masamitsu; CHO Ikuo; UMINO Norihito; OKADA Tomomi; NAKAMURA Ayako; HORI Shuichiro; TACHIBANA Kenji; KONO Toshio; NIDA Koichi; HASHIMOTO Keiichi; ITO Yoshihiro; IGARASHI Toshihiro; NAKAJIMA Junichi; ASANO Yoichi; ITO Aki; UCHIDA Naoki; SODA Yasue; UJIKAWA Hisako; HASEMI Akiko; DEMACHI Tomotsugu; HIRATA Naoshi; URABE Taku; SAKAI Shin'ichi; IDE Satoshi; OGINO Izumi; SETO Norihiko; SAKAI Kaname; HASHIMOTO Shin'ichi; HANEDA Toshio; YAMANAKA Yoshiko; MIURA Katsumi; HAGIWARA Hiroko; KOBAYASHI Masaru; INOUE Yoshihiro; TAGAMI Kiyoko; NAKAGAWA Shigeki; TSUDA Ken'ichi; MATSUBARA Makoto; TADA Taku; AOYAMA Hiroshi; MATSUZAWA Takanori; ZHAO Yanlai; YAMAZAKI Fumihito; YAMADA Mamoru; SASAKI Yoshimi; HIRAMATSU Yoshihiro; SAIGA Atsushi; KOMORI Tetsuya; UMEDA Yasuhiro; ITO Kiyoshi; KOIZUMI Makoto; WADA Hiroo; HIRANO Norio; NISHIDA Ryohei; MATSUSHIMA Takeshi; UEHIRA Kenji; OSHIMA Mitsutaka; HIRANO Shuichiro
  Bulletin of the Earthquake Research Institute, University of Tokyo, 77, 3, 199, 223, The University of Tokyo, Jan. 2003, [Peer-reviewed]
  Japanese, Research institution, A group of seismologists from eleven universities operated a dense temporary seismic network from July 1999 to July 2001 in and around the Hidaka Collision Zone, Hokkaido, Japan, where the Kurile Island arc and the northeastern Japan arc meet and collide. All waveform data were telemetered by way of a communication satellite and recorded continuously. We obtained seven thousand well-located hypocenters and 351 focal mechanisms. This research forms a part of ""The new Program of the Study and Observation for Earthquake Prediction"" in Japan started after the Hyogoken-nanbu (Kobe) earthquake in 1995.
• Volcano acoustic activity associated with the eruption of Mt. Usu, in 2000
  H. aoyama; H. Oshima; T. Maekawa
  Bulletin of Volcanological Society of Japan, 47, 5, 521, 531, Volcanological Society of Japan, 29 Nov. 2002, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, There was intense acoustic activity associated with the eruption of Mount Usu, which began on March 31, 2000. Repetitive phreatic explosions generated many isolated infrasonic signals, which were observed at plural acoustic stations. During the periods when acoustic activity was high, infrasonic pulses as many as 200 were identified every 10 minutes. Source location of infrasonic signals could be well identified from the records of the low frequency microphone network. Two active craters, Nishiyama and Konpirayama craterlets, are clearly distinguished by sound source determination analysis in spite of their proximity (〜1 km). To investigate temporal change in the acoustic activity from April to June, 2000, we developed a method to detect arrival and amplitude of infrasonic signals automatically. The number of automatically identified infrasonic signals exceeds 1.46 million during three months. It seems that there is a good correlation between acoustic activity and seismic signal amplitude. Patterns of acoustic activity and infrasonic pulse shapes observed at Usu volcano are very similar to those observed at Stromboli volcano, Italy. We named the acoustic activity attended with phreatic explosion which scatters a lot of clods, "mud-pool Strombolian type". Phreatic explosion excites not only infrasonic pulses but also seismic signals observed before the arrival of an infrasonic pulse. Existence of a Rayleigh wave phase with a large amplitude suggests that the seismic wave is excited at a shallow part of the crater.
• Evolution mechanisms of an earthquake swarm under the Hida Mountains, central Japan, in 1998
  H Aoyama; M Takeo; S Ide
  JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 107, B8, Aug. 2002, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• 2001年有珠火山人工地震探査--3次元P波速度構造--
  鬼澤真也; 大島弘光; 青山 裕; 森 済; 前川徳光; 鈴木敦生; 筒井智樹; 松尾のり道; 及川 純; 大湊隆雄; 山本圭吾; 森 健彦; 平 貴昭; 宮町 宏樹; 岡田 弘
  月刊地球, 39, 14, 21, 2002
  Japanese
• Wave properties and focal mechanisms of N-type earthquakes at Asama volcano
  H. Aoyama; M. Takeo
  Journal of Volcanology and Geothermal Research, 105, 1-2, 163, 182, Jan. 2001, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• リアルタイム地震波データに用いるランニングスペクトル解析ソフトの開発
  青山 裕; 武尾 実; 渡辺秀文
  火山, 45, 6, 323, 329, 22 Dec. 2000, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal
• Seismic activity associated with the 2000 eruption of Mt. Usu
  Oshima H.; Mori H.; Maekawa T.; Yoshida K.; Tamura S.; Ichiyanagi M.; Okada Hm.; Hamaguchi H.; Nishimura T.; Aoyama H.; Tsuji H.; Uehira K.; Miyamachi H.; Yakihara H.; Sudo Y.; Takayama T.
  PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2000, 33, 33, The Volcanological Society of Japan, 2000
  Japanese
• 1995 Explosion Experiment in Unzen Volcano
  MATSUSHIMA Takeshi; SHIMIZU Hiroshi; NISHIMURA Yuichi; UEKI Sadato; NISHIMURA Takeshi; AOKI Shigeki; HAYAKAWA Toshihiko; KAGIYAMA Tsuneomi; MIKADA Hitoshi; OIKAWA Jun; KITAMURA Takehiko; MUNEKANE Hiroshi; WATANABE Tohru; KUMAGAI Hiroyuki; TSUTSUI Tomoki; NISHI Kiyoshi; IGUCHI Masato; MIYAMACHI Hiroki; TAKAGI Akimichi; OKADA Hiromu; MAEKAWA Tokumitsu; AOYAMA Hiroshi; HOSHINO Makoto; OKU Yoshiaki; TAMEGURI Takeshi; MORITA Yuichi; HASHIMOTO Keiichi; NAKAMICHI Haruhisa; SATO Minemori; HIRABAYASHI Jun-ichi; OHBA Takeshi; NOGAMI Kenji; IDA Yoshiaki; WATANABE Hidefumi; YAMASHINA Ken'ichiro; SAWADA Munehisa; GYODA Noriya; MATSUMOTO Tokiko; MASUTANI Fumio; OSADA Noboru; TSUJI Hiroshi; IIDAKA Takashi; TAKEDA Tetsuya; ITO Takeshi; ITO Wataru; NOTSU Kenji; MORI TOshiya; TOMATSU Toshitaka; MASUYAMA Takayuki; YAMAOKA Koshun; OKUDA Takashi; NISHIHARA Masahito; HASADA Yoko; MAEDA Mitoshi; OHTA Kazuya; MATSUWO Norimichi; UMAKOSHI Kodo; FUKUI Risaku; UCHIDA Kazunari; YAKIWARA Hiroshi; OKAAMTSU Norikazu; FUJII Yushiro; MORI Takehiko; MATSUMOTO Yoshihiro; NAKABOH Makoto; YOSHIKAWA Shin; ISHIHARA KAzuhiro; TAKAYAMA Tetsuro; HENDRASTO Muhamad; RATDOMOPURBO Antonius; HIRANO SHuichirou; HIRAMATSU Hideyuki; NAGAOKA Osamu; MATSUSHIMA Masaya; AOKI Tsuneo; MAENAKA Nobuo; TORISU Keita; OGATA Makoto; MATUSUE Shin-ichi; FUKUDA Nobuo; YAMASHITA Takatsugu; IIJIMA Sei; MORI Hirokazu
  Bulletin of the Earthquake Research Institute, University of Tokyo, 72, 2/4, 167, 183, 1997, [Peer-reviewed]
  Japanese, Research institution

• Response of interval between eruptions at Shikabe Geyser to external influences
  柘植鮎太; 青山裕, 日本火山学会講演予稿集, 2024, 2024
• Trial application of the volcanic unrest index (VUI) to Mt Meakandake
  橋本武志; 青山裕; 田中良; 大倉敬宏; 森俊哉; 高木朗充, 日本火山学会講演予稿集, 2024, 2024
• Investigation of hydrothermal structure and short-term transition in Noboribetsu geothermal area based on a numerical simulation
  柘植鮎太; 田中良; 橋本武志; 青山裕, 日本地球惑星科学連合大会予稿集(Web), 2023, 2023
• Development of multi-platform next-generation WIN system (3)
  中川茂樹; 青山裕; 高橋浩晃; 前田拓人; 山本希; 鶴岡弘; 青木陽介; 内田直希; 前田裕太; 大見士朗; 中道治久; 大久保慎人; 松島健; 八木原寛; 汐見勝彦; 植平賢司; 上田英樹; 下山利浩; 溜渕功史; 大竹和生; 本多亮; 関根秀太郎, 日本地震学会秋季大会講演予稿集(CD-ROM), 2023, 2023
• Temporary seismic observation at Hakone volcano and results of seismic interferometry analysis
  山本希; 秋山翔希; 青山裕; 大湊隆雄; 寺田暁彦; 前田裕太; 大倉敬宏; 松島健; 中道治久; 本多亮, 日本地球惑星科学連合大会予稿集(Web), 2023, 2023
• Development of multi-platform next-generation WIN system (2)
  中川茂樹; 青山裕; 高橋浩晃; 前田拓人; 内田直希; 山本希; 大竹和生; 鶴岡弘; 青木陽介; 前田裕太; 大見士朗; 中道治久; 大久保慎人; 松島健; 八木原寛; 汐見勝彦; 植平賢司; 上田英樹; 宮岡一樹; 溜渕功史; 本多亮; 関根秀太郎, 日本地震学会秋季大会講演予稿集(CD-ROM), 2022, 2022
• Plumbing system of Shikabe Geyser and physical processes during eruption
  柘植鮎太; 青山裕; 秋田藤夫; 加藤和彦, 日本火山学会講演予稿集, 2022, 2022
• 道東屈斜路カルデラ地域における精密重力モニタリング（2020年〜2021年）
  名和一成; 山崎 雅; 宮川歩夢; 高橋浩晃; 大園真子; 青山 裕; 岡田和見; 山口照寛; 岡 大輔; 岡崎紀俊; 今西祐一; 西山竜一; 本多 亮; 池田 博; 白川龍生; 大井拓磨, 日本測地学会第136回講演会要旨集, Nov. 2021
  Japanese
• Reading value dependence of scale factors for spring-type relative gravimeters (2nd report)
  若林環; 風間卓仁; 大柳諒; 岡田和見; 青山裕; 高橋浩晃; 田村良明; 今西祐一; 西山竜一; 福田洋一; 吉川慎; 大倉敬宏; 山本圭吾, 日本測地学会講演会要旨, 136th, Nov. 2021
  Japanese
• Rapid volcanic deformation modeling with transient response of tiltmeters: an example from the 2018 phreatic eruption at Kusatsu-Shirane volcano
  山田大志; 寺田暁彦; 神田径; 上田英樹; 青山裕; 大倉敬宏; 小川康雄; 棚田俊收, 日本火山学会講演予稿集, 2021, Oct. 2021
• ボアホールカメラを用いたしかべ間歇泉の井戸内観測
  柘植鮎太; 青山 裕; 秋田藤夫; 加藤和彦, 日本火山学会2021年秋季大会講演予稿集, Oct. 2021
  Japanese
• 2021年3月有珠山直下やや深部の地震増加イベント
  不破智志; 宮村淳一; 奥山 哲; 青山 裕, 日本火山学会2021年秋季大会講演予稿集, Oct. 2021
  Japanese
• 十勝岳における微小傾斜変動イベントの概要と有限要素法を用いた予備的検討
  近内雪乃; 青山 裕, 日本火山学会2021年秋季大会講演予稿集, Oct. 2021
  Japanese
• 高粘性マグマの水平移動過程解明のための二次元アナログモデル実験
  吉田秀臣; 田中 良; 青山 裕, 日本火山学会2021年秋季大会講演予稿集, Oct. 2021
  Japanese
• Electric field disturbances in 2020 observed nearby Sakurajima volcano, Japan
  Y. Nakashima,; Nishimura T.; Aoyama H.; Iguchi M.; Kanda W.; Ohminato T., PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2021, 163, 163, Oct. 2021
  The Volcanological Society of Japan, Japanese
• Three-dimensional shear-wave velocity structure and shallow very-micro earthquakes above sea level in the Showa-shinzan volcano
  竹尾明子; 西田究; 石瀬素子; 青山裕; 青木陽介, 日本地震学会秋季大会講演予稿集(CD-ROM), 2021, Oct. 2021
• Volcanic tremor source location at Tokachidake volcano from cross-correlation analysis of 2018-2020 seismic data
  Theodorus Permana; Hiroshi Aoyama, 日本地球惑星科学連合大会予稿集(Web) 2021, May 2021
  English
• しかべ間歇泉で観測された噴出周期の特徴と長期的な周期変化要因の推定
  柘植鮎太; 青山 裕, 日本地球惑星科学連合大会予稿集(Web) 2021, May 2021
  Japanese
• Development of multi-platform next-generation WIN system (1)
  中川茂樹; 青山裕; 高橋浩晃; 前田拓人; 内田直希; 山本希; 大竹和生; 鶴岡弘; 青木陽介; 前田裕太; 大見士朗; 中道治久; 大久保慎人; 松島健; 八木原寛; 汐見勝彦; 植平賢司; 上田英樹; 宮岡一樹; 溜渕功史; 本多亮; 関根秀太郎, 日本地震学会秋季大会講演予稿集(CD-ROM), 2021, 2021
• Monitoring Snow Avalanches by Infrasonic and Seismic Sensors on Mt. Fuji (2019-2020 Winter Season)
  Ikeda Wataru; Ichihara Mie; Honda Ryo; Aoyama Hiroshi; Sakai Shinichi; Yoshimoto Mitsuhiro, Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research, 2020, 137, 137, Nov. 2020
  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering, Japanese
• A trial application of the Volcanic Unrest Index (VUI) to Mt. Tokachidake
  橋本武志; 青山裕; 田中良; 大倉敬宏; 森俊哉, 日本火山学会講演予稿集, 2020, Oct. 2020
• 稠密観測によって捉えた昭和新山内部における極微小低周波地震の可能性
  竹尾明子; 石瀬素子; 西田 究; 青山 裕; 青木陽介, 日本地球惑星科学連合大会予稿集(Web) 2020, May 2020
  Japanese
• 空振計および地震計を使用した冬季富士山の雪崩観測 (2018-2019冬シーズン)
  池田 航; 市原美恵; 本多 亮; 青山 裕; 酒井慎一, 日本地球惑星科学連合大会予稿集(Web) 2020, May 2020
  Japanese
• Fluid ascent dynamics of the Onikobe geyser, NE Japan: Insight from the thermal infrared imagery
  手嶌典子; 西村太志; 青山 裕; 柘植鮎太, 日本地球惑星科学連合大会予稿集(Web) 2020, May 2020
  English
• Multi-parameter observations at Shikabe geyser and unique changes in interval between eruptions
  柘植鮎太; 青山 裕; 一柳昌義, 日本地球惑星科学連合大会予稿集(Web) 2020, May 2020
  English
• Observation campaign of seismic activity and geochemistry of hot spring waters at western flank of Kusatsu-Shirane volcano, Japan
  寺田暁彦; 香取慧; 谷口無我; 山本希; 山田大志; 鬼澤真也; 西澤達治; 青山裕; 森田裕一; 大場武, 日本地球惑星科学連合大会予稿集(Web), 2020, May 2020
• 2018年草津白根火山噴火に関する総合調査 --草津白根山火山噴火から1年--
  小川 康雄; 青山 裕; 山本 希; 筒井 智樹; 寺田 暁彦; 大倉 敬宏; 神田 径; 小山 崇夫; 金子 隆之; 大湊 隆雄; 石崎泰男; 吉本 充宏; 石峯 康浩; 野上 健治; 森 俊哉; 木川田 喜一; 片岡 香子; 松元 高峰; 上石 勲; 山口 悟; 伊藤 陽一; 常松 佳恵, 自然災害科学総合シンポジウム講演論文集, 56, 1, 5, 11 Sep. 2019
  2019年9月11日(水), 於 : キャンパスプラザ京都 第1講義室草津白根山では, 近年の火山活動が湯釜火口周辺に限定されていた。2014年からは, 湯釜火口周辺で活動が高まり, 山体の膨張を伴う地震活動, 熱活動, 火山ガス成分の変化が観測され, 2年後には活動が終息した。一方で, 1500年間活動のなかった本白根山鏡池北火口で, 2018年1月23日に顕著な前駆的活動を伴わない水蒸気噴火が発生し, 人的な被害が生じた。この噴火を受けて2018年度, 2019年度に, 地震学・測地学・地球電磁気学・地球化学・地質学に渡る科研費研究が実施された。噴火に先立って前兆的な現象の有無について, それぞれの分野で検討がなされた。また水蒸気噴火後にマグマ噴火への移行の可能性もありモニタリング研究を継続したが, 現状では, 本白根火山鏡池北火口の再活動の兆しは見当たらない。一方, 草津白根山湯釜火口付近は, 2018年4月, 同9月, 2019年5月に傾斜変動を伴う地震活動が発生し, 再び活動的になってきている。, 京都大学防災研究所自然災害研究協議会, Japanese
• 平成30年北海道胆振東部地震とその災害に関する総合調査
  高橋 浩晃; 勝俣 啓; 大園 真子; 橋本 武志; 青山 裕; 酒井 慎一; 松本 聡; 岡田 知己; 小菅 正裕; 寺川 寿子; 飯尾 能久; 中尾 茂; 上嶋 誠; 柴田 智郎; 大津 直; 高井 伸雄; 飯場 正紀; 渡部 要一; 菊地 優; 岡崎 太一郎; 白井 和貴; 西村 裕一; 石川 達也; 高瀬 裕也; 永井 宏; 宮森 保紀; 三宅 弘恵; 松島 信一; 浅野 公之; 重藤 迪子; 卜部 厚志; 前田 宜浩; 石澤 友浩; 廣瀬 亘; 小山内 信智; 山田 孝; 笠井 美青; 檜垣 大助; 風間 基樹; 千木良 雅弘; 渦岡 良介; 竹林 洋史; 木村 誇; 石丸 聡; 岡田 成幸; 内田 賢悦; 有村 幹治; 植松 武是; 多々納 裕一; 梶谷 義雄; 能島 暢呂; 田村 圭子; 中村 洋光; 戸松 誠, 自然災害科学総合シンポジウム講演論文集, 56, 56, 21, 26, 11 Sep. 2019, [Domestic magazines]
  2019年9月11日(水), 於 : キャンパスプラザ京都 第1講義室「平成30年北海道胆振東部地震」とその災害に関する総合調査を実施した。震度７を記録した揺れにより, 同時多発斜面災害と, 北海道全域同時停電(ブラックアウト)が発生し, 複合的な災害となった。震源の深さは約37kmで, 大すべり域はそれより浅い20-25km付近であった。木造家屋の倒壊が多発したむかわ町市街では, 地盤構造による地震波の増幅が見られた。同時多発斜面崩壊は, 近隣の活火山の噴火による降下火砕堆積物が素因となった。札幌市内の地盤液状化地帯では, 極めて軟弱な谷埋盛土層が確認された。地震発生が未明であったことが, 建物倒壊による直接死が出なかったことに関係している可能性がある。ブラックアウトは, 社会経済活動に大きな影響を与えた。, 京都大学防災研究所自然災害研究協議会, Japanese
• 地震波解析から推定される草津白根火山本白根山2018年噴火の噴火過程
  山田大志; 黒川愛香; 寺田暁彦; 神田径; 上田英樹; 青山裕; 大倉敬宏; 小川康雄; 棚田俊收, 日本火山学会講演予稿集, 2019, 2019
• 北海道胆振地方の地震波速度構造
  椎名高裕; 勝俣啓; 一柳昌義; 高橋浩晃; 中村亮一; 加藤愛太郎; 大園真子; 青山裕; 田中良; 高田真秀; 山口照寛; 岡田和見; 酒井慎一; 松本聡; 岡田知己; 松澤暢; 平野舟一郎; 寺川寿子; 堀川信一郎; 小菅正裕; 片尾浩; 飯尾能久; 長岡愛理; 津村紀子; 上野友岳, 日本地震学会秋季大会講演予稿集(CD-ROM), 2019, 2019
• 2018年北海道胆振東部地震の余震の震源メカニズム解と応力場
  薄田悠樹; 勝俣啓; 一柳昌義; 大園真子; 青山裕; 田中良; 高田真秀; 山口照寛; 岡田和見; 高橋浩晃; 酒井慎一; 松本聡; 岡田知己; 松澤暢; 平野舟一郎; 寺川寿子; 堀川信一郎; 小菅正弘; 片尾浩; 飯尾能久; 長岡愛理; 津村紀子; 上野友岳, 日本地震学会秋季大会講演予稿集(CD-ROM), 2019, 2019
• 十勝岳の火口近傍でとらえられた力学現象
  青山裕; 橋本武志; 田中良; 大島弘光; 齋藤公一滝; 道下剛史; 奥山哲, 日本地球惑星科学連合大会予稿集(Web), 2019, 2019
• The structure of Showa-Shinzan Usu by seismic reflection surveys
  竹井 瑠一; 筒井 智樹; 多田 悠也; 森脇 知哉; 青木 陽介; 青山 裕; 丸山 豪, 公益社団法人物理探査学会学術講演会講演論文集 = Proceedings of the SEGJ Conference, 141, 201, 204, 2019
  物理探査学会, Japanese
• 2018年草津白根山噴火に関する総合調査
  小川 康雄; 青山 裕; 山本 希; 筒井 智樹; 寺田 暁彦; 大倉 敬宏; 神田 径; 小山 崇夫; 金子 隆之; 大湊 隆雄; 石崎 泰男; 吉本 充宏; 石峯 康浩; 野上 健治; 森 俊哉; 木川田 喜一; 片岡 香子; 松元 高峰; 上石 勲; 山口 悟; 伊藤 陽一; 常松 佳恵, 自然災害科学総合シンポジウム講演論文集, 55, 25, 30, 18 Sep. 2018
  平成30年9月18日(火), 於 : 京都大学宇治おうばくプラザきはだホール2018年1月23日10時02分に草津白根山を構成する3山体(白根山・逢ノ峰・本白根山)の一つである本白根山鏡池北火口で1500年ぶりの噴火が発生し, 噴石により人的な被害が発生した。この噴火は顕著な前駆的活動を伴わない水蒸気噴火であった。近年の草津白根火山では, 白根山湯釜水釜火口を中心とする水蒸気噴火活動が顕著で, 火山観測は白根山に集中している。一方で, 今回噴火した本白根山では, これまでの最新の噴火が鏡池北火口での1500年前のマグマ噴火であって, 近年, 鏡池北火口付近には顕著な地熱活動は記録されていない。今回の突発的な噴火を受けて, 以下の3点を明らかにするために総合調査を行った。(1)顕著な前駆的な活動がない水蒸気噴火プロセスの解明(2)今後の火山活動の推移の予測, 特にマグマが噴出する可能性の予測(3)融雪泥流発生リスクの評価。これらの研究のために, 地震観測, 地盤変動観測, 熱観測, 噴出物観測, 地球化学観測, 融雪泥流評価を実施した。これまでの研究成果について報告する。, 京都大学防災研究所自然災害研究協議会, Japanese
• Seismic refraction and wide-angle reflection experiment in southern Kyushu, Japan: (1) the 2017 exploration report
  MIYAMACHI Hiroki; TAKAHASHI Hiroaki; AOYAMA Hiroshi; SHIINA Takahiro; TAKADA Masamitsu; ICHIYANAGI Masayoshi; YAMAGUCHI Teruhiro; ONO Natsuki; KAZUMA Saito; ITO Chihiro; MURAI Yoshio; TSUTSUI Tomoki; YUSUKE Inoue; TAKEI Ryuichi; YAMAMOTO Mare; HIRAHARA Satoshi; NAKAYAMA Takashi; HINO Ryota; AZUMA Ryosuke; OTOMO Shuhei; KURASHIMO Eiji; IWASAKI Takaya; SHINOHARA Masanao; YAMADA Tomoaki; ABE Eiji; NAKAHIGASHI Kazuo; WATANABE Toshiki; MAEDA Yuta; HORIKAWA Shinichiro; OKUDA Takashi; TSUJI Shuhei; HASEGAWA Daima; KATAO Hiroshi; SHIBUTANI Takuo; MIURA Tsutomu; NAKAGAWA Jun; KATO Shinya; YAMASHITA Yusuke; MATSUSHIMA Takeshi; ISODA Kenshin; TRIAHADINI Agnis; TEGURI Yoshiko; MIYAMACHI Rintaro; SHIMIZU Hiroshi; KOBAYASHI Reiji; NAKAI Kazuho; SODA Masakazu; YAKIWARA Hiroshi; HIRANO Shuichiro, 日本地球惑星科学連合大会予稿集(Web), 2018, ROMBUNNO.SSS11‐10 (WEB ONLY), May 2018
  English
• 草津白根火山における臨時地震観測
  山本希; 青山裕; 筒井智樹; 寺田暁彦; 神田径; 小川康雄, 日本地球惑星科学連合大会予稿集(Web), 2018, ROMBUNNO.SVC41‐P10 (WEB ONLY), 2018
  Japanese
• 草津白根火山・本白根山で2018年1月23日に発生した噴火―地球物理学的観測からの示唆―
  寺田暁彦; 神田径; 小川康雄; 青山裕; 山本希; 筒井智樹; 大倉敬宏; 野口里奈, 日本地球惑星科学連合大会予稿集(Web), 2018, ROMBUNNO.SVC41‐37 (WEB ONLY), 2018
  Japanese
• Seismic refraction and wide-angle reflection experiment in and around the Aira caldera (2) Preliminary results and the 2018 exploration plan
  Miyamachi H.; Ito C.; Murai Y.; Tsutsui T.; Inoue Y.; Takei R.; Yamamoto M.; Hirahara S.; Nakayama T.; Azuma R.; Otomo S.; Takahashi H.; Hino R.; Abe E.; Kurashimo E.; Iwasaki T.; Shinohara M.; Yamada T.; Nakahigashi K.; Watanabe T.; Maeda Y.; Horikawa S.; Aoyama H.; Okuda T.; Tsuji S.; Hasegawa D.; Katao H.; Shibutani T.; Miura T.; Nakagawa J.; Kato S.; Yamashita Y.; Matsushima T.; Shiina T.; Teguri Y.; Miyamachi R.; Triahadini A.; Isoda K.; Shimizu H.; Kobayashi R.; Soda M.; Nakai K.; Yakiwara H.; Hirano S.; Takada M.; Tanaka Y.; Kawasaki S.; Sato N.; Ichiyanagi M.; Yamaguchi T.; Ono N.; Saito K., PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2018, 0, 105, 105, 2018
  The Volcanological Society of Japan, Japanese
• Seismic refraction and wide-angle reflection experiment in and around the Aira caldera (2) Preliminary results and the 2018 exploration plan
  Miyamachi H.; Ito C.; Murai Y.; Tsutsui T.; Inoue Y.; Takei R.; Yamamoto M.; Hirahara S.; Nakayama T.; Azuma R.; Otomo S.; Takahashi H.; Hino R.; Abe E.; Kurashimo E.; Iwasaki T.; Shinohara M.; Yamada T.; Nakahigashi K.; Watanabe T.; Maeda Y.; Horikawa S.; Aoyama H.; Okuda T.; Tsuji S.; Hasegawa D.; Katao H.; Shibutani T.; Miura T.; Nakagawa J.; Kato S.; Yamashita Y.; Matsushima T.; Shiina T.; Teguri Y.; Miyamachi R.; Triahadini A.; Isoda K.; Shimizu H.; Kobayashi R.; Soda M.; Nakai K.; Yakiwara H.; Hirano S.; Takada M.; Tanaka Y.; Kawasaki S.; Sato N.; Ichiyanagi M.; Yamaguchi T.; Ono N.; Saito K., PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2018, 0, 105, 105, 2018
  The Volcanological Society of Japan, Japanese
• Magnitude-frequency distribution of volcanic explosion earthquakes (vol 68, 125, 2016)
  Takeshi Nishimura; Masato Iguchi; Mohammad Hendrasto; Hiroshi Aoyama; Taishi Yamada; Maurizio Ripepe; Riccardo Genco, EARTH PLANETS AND SPACE, 69, Oct. 2017
  English, Others
• 室内実験及びStromboli空振観測のMUSIC法による小規模アレイ解析
  山河和也; 石井杏佳; 市原美恵; 青山裕; 西村太志, 日本火山学会講演予稿集, Sep. 2017
• Eruption Process Inferred from Multi-parameter Geophysical Observations
  Nakamichi Haruhisa; Aoyama Hiroshi, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2017, 0, 4, 4, 2017
  The Volcanological Society of Japan, Japanese
• 桜島火山における反復地震探査(最終回)
  筒井智樹; 井口正人; 中道治久; 為栗健; 大島弘光; 青山裕; 山本希; 野上健治; 大湊隆雄; 前田裕太; 大倉敬宏; 清水洋; 松島健; 八木原寛; 宮町宏樹; 小林励司; 平原聡; 辻浩; 渡邊篤志; 堀川信一郎; 園田忠臣; 吉川慎; 竹中悠亮; 平野舟一郎; 柳澤宏彰; 菅井明; 井手和彦; 長山泰淳; 滿永大輔; 小窪則夫; 重信有三; 渡辺茂; 畠山康憲, 日本地球惑星科学連合大会予稿集(Web), 2017, ROMBUNNO.SVC47‐23 (WEB ONLY), 2017
  Japanese
• カムチャツカ・クルチェフスコイ火山でのGNSS傾斜計観測
  高橋浩晃; 大園真子; 青山裕; 宮町宏樹; 松島健; 山下裕亮; GORDEEV E; MURAVYEV Y; SEROVETNIKOV S, 日本測地学会講演会要旨, 126th, 149‐150, 19 Oct. 2016
  Japanese
• Woodpecker seismicity before the flank effusive eruption at Stromboli
  Aoyama Hiroshi; Yamada Taishi; Nishimura Takeshi; Kawaguchi Ryohei; Miwa Takahiro; Fujita Eisuke; Ripepe Maurizio; Genco Riccardo, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2016, 164, 164, 2016
  The Volcanological Society of Japan, Japanese
• Relative hypocenter determination of eruption earthquakes at Stromboli volcano based on a temporary observation in June 2015 (2)
  Sugimura Shunsuke; Nishimura Takeshi; Aoyama Hiroshi; Yamada Taishi; Fujita Eisuke; Miwa Takahiro; Kawaguchi Ryohei; Ripepe Maurizio; Genco Riccardo; Valade Sebastien, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2016, 165, 165, 2016
  The Volcanological Society of Japan, Japanese
• Tilt motion prior to an explosion at Stromboli volcano, Italy (3)
  Kawaguchi R.; Nishimura T.; Aoyama H.; Yamada T.; Miwa T.; Fujita E.; Ripepe M.; Genco R.; Lacanna G., PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2016, 166, 166, 2016
  The Volcanological Society of Japan, Japanese
• カムチャッカ・クリュチェフスコイ火山での連続GNSS観測
  大園真子; 高橋浩晃; 青山裕; 宮町宏樹; 松島健; 山下裕亮; GORDEEV E; YAROSRAV M; SEROVETNIKOV S, 日本火山学会講演予稿集, 2016, 30, 2016
  Japanese
• 蔵王山における人工地震構造探査
  山本希; 三浦哲; 市來雅啓; 青山裕; 筒井智樹; 江本賢太郎; 平原聡; 中山貴史; 鳥本達矢; 大湊隆雄; 渡邉篤志; 安藤美和子; 前田裕太; 松島健; 中元真美; 宮町凛太郎; 大倉敬宏; 吉川慎; 宮町宏樹; 柳澤宏彰; 長門信也, 日本地球惑星科学連合大会予稿集(Web), 2016, ROMBUNNO.SVC47‐21 (WEB ONLY), 2016
  Japanese
• 桜島反復地震探査における測線外発破記録に見られる後続相
  筒井智樹; 為栗健; 井口正人; 中道治久; 大島弘光; 青山裕; 植木貞人; 山本希; 野上健治; 武尾実; 大湊隆雄; 市原美恵; 及川純; 小山崇夫; 前田裕太; 大倉敬宏; 清水洋; 松島健; 宮町宏樹; 小林励司; 八木原寛, 日本地球惑星科学連合大会予稿集(Web), 2016, ROMBUNNO.SVC47‐09 (WEB ONLY), 2016
  Japanese
• P40 Relative hypocenter determination of eruption earthquakes using deconvolution : Application to Stromboli volcano (2)
  Sugimura Shunsuke; Nishimura Takeshi; Aoyama Hiroshi; Yamada Taishi; Fujita Eishuke; Kawaguchi Ryohei; Miwa Takahiro; Ripepe Maurizio; Genco Riccardo, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2015, 138, 138, 2015
  The Volcanological Society of Japan, Japanese
• P33 Tilt motion prior to an explosion at Stromboli volcano, Italy (2)
  Kawaguchi R.; Nishimura T.; Aoyama H.; Yamada T.; Miwa T.; Fujita E.; Ripepe M.; Genco R.; Lacanna G, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2015, 131, 131, 2015
  The Volcanological Society of Japan, Japanese
• B1-18 Near crater observation and recent activity of Tokachi-dake volcano
  Aoyama H.; Hashimoto T.; Nishimura T.; Ichiki M.; Koyama T.; Okada K.; Tanaka R.; Yamada T.; Ounaga R.; Mishima W., PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2015, 64, 64, 2015
  The Volcanological Society of Japan, Japanese
• B1-06 Tilt motion prior to an explosion at Stromboli volcano, Italy
  Kawaguchi R.; Nishimura T.; Aoyama H.; Yamada T.; Fujita E.; Miwa T.; Genco Riccardo; Lacanna Giorgio; Ripepe Maurizio, Programme and abstracts the Volcanological Society of Japan, 2014, 60, 60, 02 Nov. 2014
  Volcanological Society of Japan, Japanese
• Characteristics of magnitude-frequency distributions of eruption earthquakes associated with Vulcanian and Strombolian explosions
  Nishimura, T; Iguchi, M; Hendrasto, M; Aoyama, H, Abstracts of Cities on Volcanoes 8, Sep. 2014
• Waveform analysis of explosion earthquake at Lokon-Empung volcano and comparative study of dilatational phase of Vulcanian eruption
  Yamada, T; Aoyama, H; Nishimura, T; Yakiwara, H; Nakamichi, H; Oikawa, J; Iguchi, M; Hendrasto, M; Suparman, Y, Abstracts of Cities on Volcanoes 8, Sep. 2014
• 樽前山の群発地震活動と石狩地方南部の地震(M_JMA5.6)
  AOYAMA HIROSHI; MORI HITOSHI; HASHIMOTO TAKESHI; OSHIMA HIROMITSU; MURAKAMI MAKOTO, 日本火山学会講演予稿集, 2014, 52, 52, 2014
  The Volcanological Society of Japan, Japanese
• 樽前山の2013年群発地震活動
  AOYAMA HIROSHI; HASHIMOTO TAKESHI; MORI HITOSHI; OSHIMA HIROMITSU; MURAKAMI MAKOTO; USUI YUJI; MIYAMOTO MASASHI, 日本火山学会講演予稿集, 2013, 33, 33, 2013
  The Volcanological Society of Japan, Japanese
• A2-02 Analyses of source mechanism of explosion earthquake observed at Lokon-Empung volcano, Indonesia
  Yamada T.; Aoyama H.; Nishimura T.; Yakiwara H.; Nakamichi H.; Iguchi M.; Oikawa J.; Hendrasto Muhamad; Suparman Yasa, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2013, 0, 21, 21, 2013
  The Volcanological Society of Japan, Japanese
• A2-03 Ultra-long period tremor during Strombolian eruption activity at Klyuchevkoi volcano
  Takahashi H.; Aoyama H.; Nakagawa M.; Matsushima T.; Miyamachi H.; Gordeev E.; Muravyev Y.; Serovetnikov S., PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2013, 22, 22, 2013
  The Volcanological Society of Japan, Japanese
• Source process of explosive eruptions inferred from a seismic array close to the active crater of Suwanosejima volcano, Japan
  Nakamichi, H; Aoyama, H; Nishimura, T; Yakiwara, H; Ohta, Y; Yokoo, A; Iguchi, M, AGU Fall meeting 2012, Dec. 2012
  English
• P07 Analyses of initial contraction phase of explosion earthquakes observed at Suwanosejima Volcano
  Hirai Y.; Nishimura T.; Iguchi M.; Tameguri T.; Oikawa J.; Yakiwara H.; Nakamichi H.; Aoyama H., PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2012, 0, 105, 105, 2012
  The Volcanological Society of Japan, Japanese
• A2-12 A distribution of annual changes of explosion seismograms in Sakurajima Volcano
  Tsutsui T.; Oikawa J.; Ichihara M.; Takeo M.; Nakamichi H.; Ohkura T.; Shimizu H.; Matsushima T.; Miyamachi H.; Yakiwara H.; Ueda Y.; Iguchi M.; Saito K.; Sugai A.; Tameguri T.; Oshima H.; Aoyama H.; Ueki S.; Yamamoto M.; Nogami K.; Ohminato T., PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2012, 0, 32, 32, 2012
  The Volcanological Society of Japan, Japanese
• P08 High-sampling Ground Tilt Observations at Kliuchevskoi Volcano, Kamchatka
  Matsushima T.; Takahashi H.; Aoyama H.; Nakagawa M.; Miyamachi H.; Goto A.; Sergey Serovetnikov; Yaroslav Muravyev; Evgeny Gordeev, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2012, 106, 106, 2012
  The Volcanological Society of Japan, Japanese
• Fuji volcano, Edited by Shigeo ARAMAKI, Toshitsugu FUJII, Setsuya NAKADA and Naomichi MIYAJI
  AOYAMA Hiroshi, Bulletin of the Volcanological Society of Japan, 56, 6, 221, 221, 31 Dec. 2011
  Volcanological Society of Japan, Japanese
• Volcano inflations prior to small vulcanian eruptions at Suwanose-jima volcano, Japan
  Nishimura, T; Iguchi, M; Oikawa, J; Yakiwara, H; Aoyama, H; Ohta, Y; Nakamichi, H; Tameguri, T, AGU Fall meeting 2011, Dec. 2011
  English
• P25 Temporary broadband seismic observation at Kusatsu-Shirane volcano
  Yamawaki Teruo; Aoyama Hiroshi; Terada Akihiko; Nogami Kenji, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2011, 137, 137, 2011
  The Volcanological Society of Japan, Japanese
• A3-01 A source model of the ground deformation observed during the volcanic tremor on 27 May 2011 : An image of a volcanic fluid ascent process inferred from a tiltmeter network of Kusatsu-Shirane volcano
  TERADA Akihiko; AOYAMA Hiroshi; NOGAMI Kenji; YAMAWAKI Teruo; SAITO Masaki, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2011, 44, 44, 2011
  The Volcanological Society of Japan, Japanese
• P31 Seismic Experiment on the 2000 New Mountain of Mt. Usu
  OSHIMA H.; Aoyama H.; Matsumoto S.; Shimizu H.; Tsutsui T., PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2011, 0, 143, 143, 2011
  The Volcanological Society of Japan, Japanese
• B3-09 Array Analysis of Explosion Earthquakes and Tremor observed at Suwanosejima Volcano, southwest Japan
  Nakamichi H.; Aoyama H.; Nishimura T.; Yakiwara H.; Ohta Y.; Yokoo A.; Iguchi M., PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2011, 0, 106, 106, 2011
  The Volcanological Society of Japan, Japanese
• 1-A05 有珠山周辺における高校での火山観測実習(火山教育とジオパーク1,口頭発表)
  一岡 祐生; 梅原 宏之; 大島 弘光; 橋本 武志; 青山 裕, 日本火山学会講演予稿集, 2010, 09 Oct. 2010
  特定非営利活動法人日本火山学会, Japanese
• P12 Experimental seismic survey in Ginnuma crater, Usu volcano
  AOYAMA Hiroshi; NAKAJIMA Atsushi; SAITO Yu・ IWAMI; SAITO Yu・ IWAMI; SAITO Yu・ IWAMI; SAITO Yu・ IWAMI, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2010, 104, 104, 2010
  The Volcanological Society of Japan, Japanese
• P03 Relocation of volcanic earthquakes in Mt. Tarumae, Hokkaido
  Tsuchiya Ryohei; Aoyama Hiroshi; Hashimoto Takeshi; Mori Hitoshi; Oshima Hiromitsu; Suzuki Atsuo; Matoba Atsushi; Ozaki Takeshi, Programme and abstracts the Volcanological Society of Japan, 2009, 10 Oct. 2009
  特定非営利活動法人日本火山学会, Japanese
• P04 Precursory activity of the 2008 eruption of Meakan-dake volcano
  AOYAMA Hiroshi; OSHIMA Hiromitsu, Programme and abstracts the Volcanological Society of Japan, 2009, 104, 104, 10 Oct. 2009
  Volcanological Society of Japan, Japanese
• Evaluation of Heat-discharge Rate through the Nishiyama steaming ground at Usu volcano, Japan: Field Experiments Using Ice Box Calorimetry
  TERADA AKIHIKO; KAGIYAMA TSUNEOMI; YOSHIKAWA SHIN; YOSHIKAWA AKIFUMI; KOYAMA HIROSHI; YAMAZAKI NOBUYUKI; HIRAMATSU HIDEYUKI; OSHIMA HIROMITSU, 北海道大学地球物理学研究報告, 72, 125, 138, 15 Mar. 2009
  We developed a new technique, Ice Box Calorimetry, for estimating heat discharge rates through steaming ground. Ice within an aluminum box provides a powerful tool for measuring the total heat transfer from the ground surface, including conductive heat, convective heat, and latent heat within vapor. Using this method, we are able to rapidly measure heat discharge rates without the need for specialized apparatus. Applying Ice Box Calorimetry to the Nishiyama steaming ground at Usu volcano, Japan in September 2006, we identified local variations in heat discharge rates. The total heat discharged from the steaming ground in September 2006 is estimated to be 16 MW., 北海道大学大学院理学研究院自然史科学部門（地球物理学） = Department of Natural History Sciences (Geophysics), Graduate School of Science, Hokkaido University, Japanese
• Quantitative evaluation of heat discharge rates from the geothermal area formed during the 2000 eruption of Usu volcano, Japan
  TERADA AKIHIKO; KAGIYAMA TSUNEOMI; MATSUSHIMA NOBUO; YOSHIKAWA SHIN; YOSHIKAWA AKIFUMI; KOYAMA HIROSHI; YAMAZAKI NOBUYUKI; HIRAMATSU HIDEYUKI; OSHIMA HIROMITSU, 北海道大学地球物理学研究報告, 72, 139, 157, 15 Mar. 2009
  We estimate heat-discharge rates for a geothermal area formed during the 2000 eruption of Usu volcano, Japan. Field observations carried out in September 2006 reveal that heat-discharge rates from fumaroles, areas of steaming grounds and crater lakes are 8, 9.2, and 2 MW, respectively. The total heat-discharge rate measured in September 2006 represents just 1% of the rate immediately following the eruption. Integration of the heat-discharge rate from April 2000 to September 2006 yields an accumulated discharge of approximately 2.3 × 10^[16]J, equating to the cooling of 8 × 10^6 m^3 of magma. This amount of magma corresponds to several percent of the total intruded magma volume estimated from analyses of ground deformation associated with the 2000 eruption. Compared with the 1977 eruption, the 2000 eruption involved the discharge of large amounts of heat from fumaroles. Fumaroles that developed during the 2000 eruption showed a decline in activity in short time. Areas of steaming ground associated with the 2000 eruption showed more rapid growth compared with those of the 1977 eruption but discharged less heat. We suspect that differences in the hydrological environments of the two eruptions (e.g., permeability around the intruded magmas) led to contrasting patterns of propagation of the hydrothermal systems around the intruded magmas., 北海道大学大学院理学研究院自然史科学部門（地球物理学） = Department of Natural History Sciences (Geophysics), Graduate School of Science, Hokkaido University, Japanese
• P60 Reexamination of consecutive eruption of Mt. Asama in September, 2004
  AOYAMA Hiroshi; TAKEO Minoru, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2008, 151, 151, 2008
  The Volcanological Society of Japan, Japanese
• 「地震学夏の学校2007」総合報告
  吉澤 和範; 青山 裕; 高橋 浩晃; 出原 光暉; 太田 和晃; 佐藤 一平, 日本地震学会ニュースレター, 19, 4, 9, 13, 10 Nov. 2007
  Japanese
• 伊豆の衝突と神奈川県西部のテクトニクス 稠密地震観測による南部フォッサマグナの地震波速度構造
  中道治久; 渡辺秀文; 大湊隆雄; 鍵山恒臣; 及川純; 竹田豊太郎; 小山悦郎; 小林知勝; 長田昇; 辻浩; 大島弘光; 青山裕; 前川徳光; 鈴木敦生; 田中聡; 西村太志; 仁田交市; 山崎純; 萩原道徳; 山岡耕春; 山田守; 大倉敬宏; 須藤靖明; 井口正人; 清水洋; 植平賢司; 松島健; 八木原寛, 月刊地球, 71, 76, 01 Feb. 2007
  Japanese
• 3次元可視画像撮影に向けた無線同期装置の開発
  青山 裕, 火山爆発のダイナミックス，文部科学省科学研究費特定領域研究(領域番号422)研究成果報告書(平成18年度), 290, 292, 2007
  Japanese
• B14 Time-dependent model for volume changes in pressure sources at Asama volcano, central Japan, estimated with vertical deformation by precise leveling during 1902-2005 (Part 2)(THE VOLCANOLOGICAL SOCIETY OF JAPAN 2006 FALL MEETING)
  Murase Masayuki; Ito Takeo; Miyajima Rikio; Mori Hitoshi; Aoyama Hiroshi; Oshima Hiromitu; Yoshida Yuka; Terada Akihiko; Koyama Eturo; Takeda Toyotaro; Watanabe Hidefumi; Kimata Fumiaki; Fujii Naoyuki, Programme and abstracts the Volcanological Society of Japan, 2006, 70, 70, 23 Oct. 2006
  特定非営利活動法人日本火山学会, Japanese
• P25 Microseismicity of Usu Volcano in the dormant period (Preliminary Report)(THE VOLCANOLOGICAL SOCIETY OF JAPAN 2006 FALL MEETING)
  AOYAMA Hiroshi; TAMEGURI Takeshi; ONIZAWA Shin'ya; SUZUKI Atsuo; MULYANA Iyan; OSHIMA Hiromitsu; MAEKAWA Tokumitsu; SHIGA Toru; YOSHIKAWA Akifumi; KOYAMA Hiroshi; NAKAHASHI Masaki; FUKUYAMA Yoshiaki, Programme and abstracts the Volcanological Society of Japan, 2006, 139, 139, 23 Oct. 2006
  特定非営利活動法人日本火山学会, Japanese
• P37 Height changes after 2000 eruption of Mt. Usu(THE VOLCANOLOGICAL SOCIETY OF JAPAN 2006 FALL MEETING)
  Yoshida Y; Oshima H; Mori H; Maekawa T; Suzuki A; Aoyama H; Murase M; Miyajima R; Kimata F; Uchida K; Michihana H; Shiga T; Fukuyama Y; Oikawa F, Programme and abstracts the Volcanological Society of Japan, 2006, 151, 151, 23 Oct. 2006
  特定非営利活動法人日本火山学会, Japanese
• 水準測量から推定する1902‐2005浅間山圧力源体積時間依存モデル 2
  MURASE MASAYUKI; ITO TAKEO; MIYAJIMA RIKIO; MORI HITOSHI; AOYAMA HIROSHI; OSHIMA HIROMITSU; YOSHIDA YUKA; TERADA AKIHIKO; KOYAMA ETSURO; TAKEDA TOYOTARO; WATANABE HIDEFUMI; KIMATA FUMIAKI; FUJII NAOYUKI, 日本火山学会講演予稿集, 2006, 70, 70, 2006
  The Volcanological Society of Japan, Japanese
• 火山観測用ドップラーレーダーの開発−−動作試験−−
  大島弘光; 青山 裕, 火山爆発のダイナミックス，文部科学省科学研究費特定領域研究(領域番号422)研究成果報告書(平成17年度), 295, 298, 2006
  Japanese
• 3次元可視画像撮影装置の試作
  青山 裕, 火山爆発のダイナミックス！文部科学省科学研究費特定領域研究(領域番号422)研究成果報告書(平成17年度), 291, 294, 2006
  Japanese
• P33 Subsidense of Mt. Usu after the 2000 eruption revealed by precise leveling data(THE VOLCANOLOGICAL SOCIETY OF JAPAN 2005 FALL MEETING)
  Yoshida Y; Oshima H; Maekawa T; Suzuki A; Aoyama H, Programme and abstracts the Volcanological Society of Japan, 2005, 133, 133, 05 Oct. 2005
  特定非営利活動法人日本火山学会, Japanese
• B32 A plan of development of 3D image capturing system for volcano monitoring(THE VOLCANOLOGICAL SOCIETY OF JAPAN 2005 FALL MEETING)
  Aoyama Hiroshi, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2005, 88, 88, 2005
  The Volcanological Society of Japan, Japanese
• B15 Estimation of Pressure Sources at Asama Volcano, Central Japan from Vertical Deformation Detected by Precise Leveling(THE VOLCANOLOGICAL SOCIETY OF JAPAN 2005 FALL MEETING)
  Murase Masayuki; Ono Koji; Ohta Yusaku; Nishimae Kenicni; Kariya Shinichi; Miyajima Rikio; Kimata Fumiaki; Mori Hitoshi; Aoyama Hiroshi; Terada Akihiko; Koyama Eturo; Takeda Toyotaro; Osada Noboru; Watanabe Hidefumi, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2005, 71, 71, 2005
  The Volcanological Society of Japan, Japanese
• 火山観測用ドップラーレーダーの開発−−データ処理装置−−
  大島弘光; 青山 裕, 火山爆発のダイナミックス，文部科学省科学研究費特定領域研究(領域番号422)研究成果報告書(平成16年度), 274, 277, 2005
  Japanese
• 浅間火山における2004年水準測量の結果と(1935-1939-1953年に観測された)上下変動にもとづく圧力源の推定
  小野幸治; 村瀬雅之; 木股文昭; 宮島力雄; 太田雄策; 仮屋新一; 西前健一; 柏木雅生; 森 済; 青山 裕; 寺田暁彦; 小山悦郎; 竹田豊太郎; 長田 昇; 渡辺秀文, 2004年浅間火山の噴火に関する総合的調査，科学研究費補助金(特別研究促進費)研究成果報告書C-18（課題番号16800002）, 37, 39, 2005
  Japanese
• 日本の火山性地震・微動のデータベース(共著)
  大島弘光; 青山 裕; 筒井智樹; 西村太志; 田中 聡; 藤田英輔; 熊谷博之; 中道治久; 及川 純; 大湊隆雄; 小林知勝; 武尾 実; 鬼沢真也; 高木憲朗; 中野 優; 井口正人; 為栗 健; 須藤靖明; 森 健彦; 馬越孝道; 清水 洋; 八木原 寛, 日本の火山性地震・微動のデータベース, 649, 2004
• S17 Dynamics of Volcanic Gloud at Asama Volcano in 2004
  TERADA Akihiko; SHIMANO Taketo; KOYAMA Etsuro; AOYAMA Hiroshi; IIJIMA Sei, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2004, 0, 197, 197, 2004
  The Volcanological Society of Japan, Japanese
• 火山観測用ドップラーレーダーの試作−−アンテナおよび送・受信装置−−
  大島弘光; 青山 裕, 火山爆発のダイナミックス，文部科学省科学研究費特定領域研究(領域番号422)研究成果報告書(平成15年度), 308, 311, 2004
  Japanese
• A clear seismic later arrival in the records of Seismic Exploration on Hokkaido Komagatake volcano with Active Sources in 2002
  TSUTSUI Tomoki; OSHIMA Hiromitsu; AOYAMA Hiroshi; ONIZAWA Shin'ya, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2003, 0, 7, 7, 2003
  The Volcanological Society of Japan, Japanese
• Acoustic signal and ground motion observed at Mt. Usu on 31 March 2000
  AOYAMA Hiroshi; OSHIMA Hiromitsu; MAEKAWA Tokumitsu, Programme and abstracts the Volcanological Society of Japan, 2002, 2, 194, 194, 22 Oct. 2002
  特定非営利活動法人日本火山学会, Japanese
• 2001年有珠火山人工地震探査--3次元P波速度構造 (総特集 活動的火山) -- (1章 北海道・東北の活動的火山)
  鬼澤 真也; 大島 弘光; 青山 裕, 号外地球, 39, 14, 21, 2002
  海洋出版, Japanese
• 2000年有珠山噴火の予測と減災情報・助言の活用（前兆地震発生から噴火開始まで）
  岡田 弘; 大島弘光; 青山 裕; 森 済; 宇井忠英; 勝井義雄, 有珠山2000年噴火と火山防災に関する総合的観測研究，平成12年度科学研究費補助金（特別研究促進費）研究成果報告書（課題番号12800001）, 34, 57, 2002
  Japanese
• Volcano-Acoustic Feature of the Mud-Pool Strombolian
  Aoyama H; Oshima H; Maekawa T, Programme and abstracts the Volcanological Society of Japan, 2001, 2, 81, 81, 01 Oct. 2001
  Volcanological Society of Japan, Japanese
• Volcano-Acoustic activity associated with the 2000 eruption of Mt. Usu
  Oshima H; Maekawa T; Aoyama H, Programme and abstracts the Volcanological Society of Japan, 2000, 2, 159, 159, 30 Sep. 2000
  Volcanological Society of Japan, Japanese
• Evolution of Earthquakes Swarm Under Hida Mountains in 1998
  AOYAMA Hiroshi; IDE Satoshi; TAKEO Minoru, 日本地震学会講演予稿集 = Programme and abstracts, the Seismological Society of Japan, 1999, 2, P035, 09 Nov. 1999
  Japanese
• Activities and Source Mechanisms of the Series of Earthquakes Around Kamikouchi, August 1998
  AOYAMA H.; IDE S.; MATSUBARA M.; HIRATA N.; TAKEO M.; SAKAI S.; SAKAI K.; KOBAYASHI M.; HANEDA T.; HASHIMOTO S., 日本地震学会講演予稿集 = Programme and abstracts, the Seismological Society of Japan, 1998, 2, 09 Oct. 1998
  Japanese
• Wave properties of N-type earthquakes observed by broad-band seismometers at Asama Volcano
  AOYAMA Hiroshi; TAKEO Minoru; TSUJI Hiroshi; KANESHIMA Satoshi; OIKAWA Jun; GYODA Noriya, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 1996, 94, 94, 1996
  The Volcanological Society of Japan, Japanese

• 北海道の地震と津波
  青山 裕, 10 火山噴火と地震
  北海道新聞社, Feb. 2012, 9784894536340, 245, Japanese, General book, [Contributor]

• Shallow crustal activity observed at the crater area of Tokachidake volcano
  AOYAMA Hiroshi; HASHIOTO Takeshi; TANAKA Ryo; OSHIMA Hiromitsu; SAITO Kouichiro; MICHISHITA Tsuyoshi; OKUYAMA Satoshi; JMA Sapporo
  Japan Geoscience Union Meeting, May 2019, Japan Geoscience Union, Japanese, Oral presentation
  Chiba city, [Domestic Conference]
• Seismic survey in the cryptodome of Showa-Shinzan, Usu Volcano, Hokkaido
  Tsutsui Tomoki; Takei Ryuichi; Tada Yuya; Moriwaki Tomoya; Aoyama Hiroshi; Aoki Yosuke; Maruyama Go
  PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2018, The Volcanological Society of Japan, Japanese
  2018 - 2018
• Near-crater observation of Tokachi-dake volcano
  AOYAMA Hiroshi
  Volcanological Society of Japan, 2017 Fall Meeting, Oct. 2017, 日本火山学会, Japanese, Poster presentation
  熊本市, [Domestic Conference]
• 火山噴火の発生を探る〜日ロ共同火山観測研究〜
  青山 裕
  2016年度地震火山研究観測センターシンポジウム, 25 Mar. 2017, 北海道大学大学院理学研究院附属地震火山研究観測センター, Japanese, Public discourse
  札幌市, Japan, [Domestic Conference]
• Woodpecker seismicity before the flank effusive eruption at Stromboli
  AOYAMA Hiroshi; YAMADA Taishi; NISHIMURA Takeshi; KAWAGUCHI Ryohei; MIWA Takahiro; FUJITA Eisuke; RIPEPE Maurizio; GENCO Riccardo
  Volcanological Society of Japan, 2016 Fall Meeting, Oct. 2016, 日本火山学会, Japanese, Poster presentation
  富士吉田市, [Domestic Conference]
• 道内火山における地震学的研究の60年
  青山 裕
  2015年度地震火山研究観測センターシンポジウム, 19 Mar. 2016, 北海道大学大学院理学研究院附属地震火山研究観測センター, Japanese, Public discourse
  札幌市, [Domestic Conference]
• Near crater observation and recent activity of Tokachi-dake volcano
  AOYAMA Hiroshi; HASHIMOTO Takeshi; NISHIMURA Takeshi; ICHIKI Masahiro; KOYAMA Takao; OKADA Kazumi; TANAKA Ryo; YAMADA Taishi; OUNAGA Ryosuke; MISHIMA Wataru
  Volcanological Society of Japan, 2015 Fall Meeting, Oct. 2015, 日本火山学会, Japanese, Oral presentation
  富山市, [Domestic Conference]
• Seismic signal variation during the transitional phase from repetitive explosion to effusive eruption at Stromboli
  AOYAMA Hiroshi; NISHIMURA Takeshi; YAMADA Taishi; KAWAGUCHI Ryohei; MIWA Takahiro; FUJITA Eisuke; RIPEPE Maurizio; GENCO Riccardo; LACANNA Giorgio
  2015 Japan Geoscience Union Meeting, May 2015, 日本地球惑星科学連合, Japanese, Oral presentation
  千葉市, [Domestic Conference]
• Seismic swarm near Tarumaesan volcano and Ishikari-Nanbu Earthquake (MJMA5.6)
  AOYAMA Hiroshi; MORI Hitoshi; HASHIMOTO Takeshi; OSHIMA Hiromitsu; MURAKAMI Makoto
  Volcanological Society of Japan, 2014 Fall Meeting, Oct. 2014, 日本火山学会, Japanese, Oral presentation
  福岡市, [Domestic Conference]
• Dike opening inferred from tilt change prior to the small phreatic eruption of Meakan-dake volcano, Hokkaido, Japan, in November 2008
  AOYAMA Hiroshi; OSHIMA Hiromitsu
  8th Biennial Workshop on Japan-Kamchatka-Alaska Subduction Processes, Jul. 2014, Institute of Seismology and Volcanology and Department of Natural History Sciences, Hokkaido University, English, Oral presentation
  Sapporo, [International presentation]
• Seismic swarm at Tarumaesan volcano in 2013
  AOYAMA Hiroshi; HASHIMOTO Takeshi; MORI Hitoshi; OSHIMA Hiromitsu; MURAKAMI Makoto; USUI Yuji; MIYAMOTO Masashi
  Volcanological Society of Japan, 2013 Fall Meeting, Oct. 2013, 日本火山学会, Japanese, Invited oral presentation
  猪苗代町, [Domestic Conference]
• Wave properties of explosion earthquake and precursory tilt change associated with vulcanian eruptions at Lokon volcano
  AOYAMA Hiroshi; YAMADA Taishi; NISHIMURA Takeshi; YAKIWARA Hiroshi; NAKAMICHI Haruhisa; OIKAWA Jun; IGUCHI Masato; HENDRASTO Muhamad; SUPARMAN Yasa
  2013 Japan Geoscience Union Meeting, May 2013, 日本地球惑星科学連合, Japanese, Oral presentation
  千葉市, [Domestic Conference]
• インドネシア，ロコン火山における地震・地殻変動観測
  青山 裕
  2012年度地震火山研究観測センターシンポジウム, Mar. 2013, 北海道大学大学院理学研究院附属地震火山研究観測センター, Public discourse
  札幌市, Japan, [Domestic Conference]
• Seismological study on precursors of the small phreatic eruptions at Meakan-dake volcano in 2006 and 2008
  AOYAMA Hiroshi; OGISO Masashi
  7th Biennual Workshop on Japan-Kamchatka-Alaska Subduction Processes, Aug. 2011, Institute of Volcanology and Seismology FEB RAS, English, Poster presentation
  Petropavlovsk-Kamchatsky, [International presentation]
• Experimental seismic survey in Ginnuma crater, Usu volcano
  AOYAMA Hiroshi; NAKAJIMA Atsushi; SAITO Yu; IWAMI Yurika; YANAI Kaori; YAMADA Taishi
  Volcanological Society of Japan, 2010 Fall Meeting, Oct. 2010, 日本火山学会, Japanese, Poster presentation
  京都市, [Domestic Conference]
• Inter-eruptive volcanism at Usu volcano: Micro-earthquakes and dome subsidence
  AOYAMA Hiroshi; ONIZAWA Shin'ya; KOBAYASHI Tomokadu; TAMEGURI Takeshi; HASHIMOTO Takeshi; OSHIMA Hiromitsu; MORI Hitoshi
  AGU 2009 Fall Meeting, Dec. 2009, American Geophysical Union, English, Poster presentation
  San Francisco, [International presentation]
• Precursory activity of the 2008 eruption of Meakan-dake volcano
  AOYAMA Hiroshi; OSHIMA Hiromitsu
  Volcanological Society of Japan, 2009 Fall Meeting, Oct. 2009, 日本火山学会, Japanese, Poster presentation
  小田原市, [Domestic Conference]
• Reexamination of consecutive eruption of Mt. Asama in September 2004
  AOYAMA Hiroshi; TAKEO Minoru
  Volcanological Society of Japan, 2008 Fall Meeting, Oct. 2008, 日本火山学会, Japanese, Poster presentation
  盛岡市, [Domestic Conference]
• Tilt Change Preceding to a Small Phreatic Explosion of Meakan-dake Volcano
  AOYAMA Hiroshi; OSHIMA Hiromitsu
  Cities on Volcano 5, Nov. 2007, Volcanological Society of Japan, English, Poster presentation
  Shimabara, [International presentation]
• Simplified test on tilt response of CMG40T seismometers
  AOYAMA Hiroshi
  Seismological Society of Japan, 2007 Fall Meeting, Oct. 2007, 日本地震学会, Japanese, Poster presentation
  仙台市, [Domestic Conference]
• A very long period seismic signal preceding a small phreatic explosion of Meakan-dake volcano, Hokkaido, Japan
  AOYAMA Hiroshi; OSHIMA Hiromitsu
  2007 Japan Geoscience Union Meeting, May 2007, 日本地球惑星科学連合, Japanese, Oral presentation
  千葉市, [Domestic Conference]
• Micro-earthquake activity at Usu volcano revealed by temporary dense observation
  AOYAMA Hiroshi; ONIZAWA Shin'ya; TAMEGURI Takeshi; SUZUKI Atsuo; MAEKAWA Tokumitsu; OSHIMA Hiromitsu; MORI Hitoshi, Y; HASHIMOTO Takeshi; SHIGA Toru; KOYAMA Hiroshi; NAKAHASHI Masaki; YOSHIKAWA Akifumi; FUKUYAMA Yoshiaki
  2007 Japan Geoscience Union Meeting, May 2007, 日本地球惑星科学連合, Japanese, Oral presentation
  千葉市, [Domestic Conference]
• Microseismicity of Usu Volcano in the dormant period (Preliminary Report)
  AOYAMA Hiroshi; TAMEGURI Takeshi; ONIZAWA Shin'ya; SUZUKI Atsuo; MULYANA Iyan; OSHIMA Hiromitsu; MAEKAWA Tokumitsu; SHIGA Toru; YOSHIKAWA Akifumi; KOYAMA Hiroshi; NAKAHASHI Masaki; FUKUYAMA Yoshiaki
  Volcanological Society of Japan, 2006 Fall Meeting, Oct. 2006, 日本火山学会, Japanese, Poster presentation
  阿蘇市, [Domestic Conference]
• Seismic swarm and emission of high temperature gas at Tarumae volcano induced by the 2003 Tokachi-oki earthquake
  AOYAMA Hiroshi
  2006 Japan Geoscience Union Meeting, May 2006, 日本地球惑星科学連合, Japanese, Poster presentation
  千葉市, [Domestic Conference]
• A plan of development of 3D image capturing system for volcano monitoring
  AOYAMA Hiroshi
  Volcanological Society of Japan, 2005 Fall Meeting, Oct. 2005, 日本火山学会, Japanese, Oral presentation
  札幌市, [Domestic Conference]
• Acoustic signal and ground motion observed at Mt. Usu on 31 March 2000
  AOYAMA Hiroshi; OSHIMA Hiromitsu; MAEKAWA Tokumitsu
  Volcanological Society of Japan, 2002 Fall Meeting, Oct. 2002, 日本火山学会, Japanese, Poster presentation
  仙台市, [Domestic Conference]
• Volcano acoustic activity associated with the eruption of Mt. Usu, 2000 -Mud-pool Strombolian-
  AOYAMA Hiroshi; OSHIMA Hiromitsu; MAEKAWA Tokumitsu
  AGU 2001 Fall Meeting, Dec. 2001, American Geophysical Union, English, Poster presentation
  San Francisco, [International presentation]
• Volcano-Acoustic Feature of the Mud-Pool Strombolian
  AOYAMA Hiroshi; OSHIMA Hiromitsu; MAEKAWA Tokumitsu
  Volcanological Society of Japan, 2001 Fall Meeting, Oct. 2001, 日本火山学会, Japanese, Poster presentation
  鹿児島市, [Domestic Conference]
• Examination of a simple fluid flow model as a source of long-period earthquake
  AOYAMA Hiroshi; TAKEO Minoru
  地球惑星科学関連学会合同大会, Apr. 2000, 地球惑星科学関連学会, Japanese, Oral presentation
  新宿区, [Domestic Conference]
• Evolution of Earthquake Swarm Under Hida Mountains, Central Japan, in 1998
  AOYAMA Hiroshi; IDE Satoshi; TAKEO Minoru
  AGU 1999 Fall meeting, Dec. 1999, American Geophysical Union, English, Poster presentation
  San Francisco, [International presentation]
• Evolution of Earthquakes Swarm Under Hida Mountains in 1998
  AOYAMA Hiroshi; IDE Satoshi; TAKEO Minoru
  日本地震学会1999年秋季大会, Oct. 1999, 日本地震学会, Japanese, Poster presentation
  仙台, [Domestic Conference]
• Statistics of Seismicity and Source Processes of Earthquake Swarm Around Kamikouchi, Japan, in 1998
  AOYAMA Hiroshi; IDE SAtoshi; TAKEO Minoru; HIRATA Naoshi
  IUGG XXII General Assembly, Jul. 1999, Internatinonal Union of Geodesy and Geophysics, English, Poster presentation
  Birmingham, [International presentation]
• Wave Properties and Focal Mechanisms of N-type Earthquakes at Asama Volcano
  AOYAMA Hiroshi; TAKEO Minoru
  AGU 1998 Fall meeting, Dec. 1998, American Geophysical Union, English, Poster presentation
  San Francisco, [International presentation]
• Activities and Source Mechanisms of the Series of Earthquakes Around Kamikouchi, August 1998
  AOYAMA Hiroshi; IDE Satoshi; MATSUBARA Makoto; HIRATA Naoshi; TAKEO Minoru; SAKAI Shin'ichi; SAKAI Kaname; KOBAYASHI Masaru; HANEDA Toshio; HASHIMOTO Shin'ichi
  Seismological Society of Japan, 1998 Fall Meeting, Oct. 1998, 日本地震学会, Japanese, Poster presentation
  [Domestic Conference]
• Wave properties and focal mechanisms of N-type earthquakes at Asama Volcano
  AOYAMA Hiroshi; TAKEO Minoru
  地球惑星科学関連学会合同大会, Apr. 1998, 地球惑星科学関連学会, Japanese, Oral presentation
  新宿区, [Domestic Conference]
• Wave properties of N-type earthquakes observed by broad-band seismometers at Asama Volcano
  AOYAMA Hiroshi; TAKEO Minoru; TSUJI Hiroshi; KANESHIMA Satoshi; OIKAWA Jun; GYODA Noriya
  Volcanological Society of Japan, 1998 Fall Meeting, Nov. 1996, 日本火山学会, Japanese, Oral presentation
  大島町, [Domestic Conference]

• 大学院共通授業科目（一般科目）：複合領域, 2024年, 修士課程, 大学院共通科目
• 地震・火山噴火予知特論, 2024年, 修士課程, 理学院
• 自然史科学特別講義Ⅰ, 2024年, 修士課程, 理学院
• 自然史科学特別講義Ⅱ, 2024年, 修士課程, 理学院
• データ解析学, 2024年, 学士課程, 理学部
• 地球計測実習, 2024年, 学士課程, 理学部
• 地球惑星科学Ⅰ, 2024年, 学士課程, 全学教育

• 2011 - Present
  JAPAN GEOSCIENCE UNION
• 1998 - Present
  American Geophysical Union
• 1996 - Present
  The Volcanological Society of Japan
• 1996 - Present
  The Seismological Society of Japan

• 世界中の大規模爆発的噴火の規模をリアルタイム推定するシステムの開発
  科学研究費助成事業
  01 Apr. 2025 - 31 Mar. 2029
  高橋 浩晃; 吉澤 和範; 青山 裕; 山中 悠資
  日本学術振興会, 基盤研究(B), 北海道大学, 25K01074
• 地盤表層域における熱水放出の状態変化に関する実験観測的研究
  科学研究費助成事業 挑戦的研究(萌芽)
  09 Jul. 2021 - 31 Mar. 2024
  青山 裕; 西村 太志; 田中 良
  初年度である2021年度は，北海道南部のしかべ間歇泉で本研究課題の開始前から実施している多項目連続観測を継続して噴出孔内の映像撮影や圧力測定を試みたほか，鬼首間歇泉で取得した熱赤外カメラ及び空気振動観測のデータ解析，霧島硫黄山の噴気観測，地下構造の深部からの熱水供給率を変化させたときの熱水流動の応答に関する数値計算などを実施した．
  しかべ間歇泉では，間歇泉噴出孔の保守業者の厚意により，6月および9月の作業時に業者所有の孔内撮影用カメラを間歇泉内に挿入し，孔内の状況把握や孔底深度の計測，噴出時の気泡発生状況の動画撮影等を行った．この調査により，掘削深度は約27mであり，ケーシング部分は上部の20mで下部の約7mは裸孔となっていることが始めて確認された．また，井戸の下端には熱水溜まりのような空洞は存在せず，ケーシング下端や裸孔部分の亀裂から井戸内に高温水が流入していることが明らかになった．1月には研究費で購入した圧力センサーを用いて噴出中の孔内圧力を測定し，噴出サイクルを通した井戸内圧力の時系列データを取得した．この調査時には，噴出ごとの熱水噴出体積の推定を試み，過去に見積もられた400L程度であることを確認した．
  鬼首間歇泉では，間欠泉噴出時に観測した熱赤外映像および空気振動観測のデータ解析を進めた．熱赤外映像は時間的な差分を取ることで短周期変動を強調し，熱水の上方への噴出を調べた結果，周期1秒以下の調和振動が見られることを見出した．空気振動にも同様の振動が見られることから，噴出孔の極浅部で共鳴現象が起きていることが示唆された．
  宮崎県の霧島硫黄山では，自然の噴気について熱赤外映像の試験観測を行った．予備的な解析では，連続的な蒸気を噴出する噴気にも調和振動的な振る舞いが認められることから，間歇泉現象や噴気現象には浅部に共鳴現象を励起する類似のプロセスがあることが示唆された．
  日本学術振興会, 挑戦的研究(萌芽), 北海道大学, 21K18784
• Development and Reliability Evaluation of an Automatic Estimation System for Snow and Mud Flow Paths: A case study at Mt. Fuji
  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
  Apr. 2018 - Mar. 2021
  Aoyama Hiroshi
  We conducted continuous observations of ground vibration and sound waves excited by slush flow occurring on Mt. Fuji and developed a source location estimation system for seismic signals. The observation equipment was deployed mainly along the Fuji-Subaru line from December to May every year from 2018. Unfortunately, slush flows did not occur for two seasons after the start of this project, and we could not collect the data as originally planned. However, on March 21, 2021, the last year of the project, slush flows occurred along the Fuji-Subaru line, and we are waiting for the final data collection. In parallel with the field observations, we have also developed and implemented a source location estimation system for seismic signals using the spatial distribution of ground motion amplitudes, which is being tested at the Mount Fuji Research Institute and Hokkaido University.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 18K04649
• Investigation of the internal structure of the lava dome in Showa Shinzan, Usu volcano, japan, from seismic, gravimetric, and muographic observations
  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
  Apr. 2017 - Mar. 2021
  AOKI Yosuke
  The goal of this study is to understand the mechanics of the emergence of a lava dome. To achieve the goal, we conducted a seismic experiment in Showa-shinzan, a lava dome emerged during the 1943-1945 eruption of Usu Volcano, northern Japan. We imaged the seismic velocity structure beneath the lava dome by seismic interferometry using ambient seismic noise. Our results image a high-velocity body beneath the lava dome, indicating that the lava dome is mainly composed of actively intruded magma, rather than passive uplift of the surface. Also, we fortuitously found previously unidentified volcanic earthquakes that may result from thermal cooling of the intruded lava. Details of these earthquakes will be investigated later.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), The University of Tokyo, 17K05625
• Comprehensive Survey of 2018 Kusatsu-Shirane Eruption
  Grants-in-Aid for Scientific Research Grant-in-Aid for Special Purposes
  08 Feb. 2018 - 31 Mar. 2019
  Ogawa Yasuo; Kaneko Takayuki; Ominato Takao; Ishimine Yasuhiro; Matsumoto Takane; Tamaguchi Satoru; Ito Yoichi; Tsunematsu Mae
  Motoshirane volcano had phreatic eruption on January 23, 2018 with casualties. This study aimed at the followings: (1) elucidating the eruption mechanism, (2) monitoring and prediction of on-going volcanic activity and (3) assessment of potential lahar. Despite the volcanic tremor two minutes prior to the eruption, we could not find significant precursory seismic activity. We observed temporal tilt changes at the borehole stations and they are explained by a crack inflation and deflation. We observed no anomalous surface temperature at the new vent in March, 2018, however, from the aeromagnetic survey, the temperature of the regional volcanic area at depth seems elevated over the years. The total ejected mass was estimated as 36,000 tons which is 1/10 of that of 2014 Mt. Ontake eruption. From the chemical analyses of the ash, the ejected gas has different origin from known fumaroles. We also made risk assessment of lahar.
  Japan Society for the Promotion of Science, Grant-in-Aid for Special Purposes, Tokyo Institute of Technology, 17K20141
• Estimation of eruption cloud volume with acoustic observation for hazard evaluation
  Grants-in-Aid for Scientific Research Grant-in-Aid for Research Activity Start-up
  25 Aug. 2017 - 31 Mar. 2019
  Yamada Taishi; Aoyama Hiroshi; Ueda Hideki; Iguchi Masato; Tameguri Takeshi
  The present project proposes a method to evaluate eruption cloud volume using acoustic (infrasound) signals. The finding is that infrasound-derived cloud volume, that is obtained by infrasound signal analysis, is well correlate with buoyancy-derived volume, which derived from a mathematical model with the maximum eruption cloud height data. Difference between both estimates can be explained by time evolution of eruption cloud during ascending process. Since infrasound data can be transmitted in real-time, the method can contribute the hazard evaluation of volcanic eruption.
  A visual observation tool for volcanic eruption cloud synchronized GNSS time stump is also developed. Considering kinematic features of eruption cloud with video observation, accuracy of volume estimation with acoustic observation can be improved in the future works.
  Japan Society for the Promotion of Science, Grant-in-Aid for Research Activity Start-up, National Research Institute for Earth Science and Disaster Prevention, 17H07345
• Comprehensive study on the 2018 Hokkaido Eastern Iburi Earthquake and its disaster
  Grants-in-Aid for Scientific Research Grant-in-Aid for Special Purposes
  Oct. 2018 - Mar. 2019
  Takahashi Hiroaki
  Comprehensive investigation on the 2018 Hokkaido Eastern Iburi earthquake and its disaster was conducted. Mainshock rupture initiated at deepest part and major slip was occurred in 20-30km deep. Multiple simultaneous landslides in Atsuma town was induced by combination of strong ground shaking and weak sliding layer between pyroclastic fall deposit layers. Halloysite cray minerals was discovered in all sliding layers. Simulation suggested landslides might attack residential houses within 6 seconds. Observed peak ground motions in nearby area were larger than common distance attenuation model. Severe wooden house damage in Mukawa town was due to amplified seismic waves due to site effects. Sounding and boring investigation revealed filled low-density volcanic ash and higher groundwater level in liquefaction area. Electricity blackout caused severe damage in social and economic activities of Hokkaido. These scientific outcomes were explained to residents at public briefing session.
  Japan Society for the Promotion of Science, Grant-in-Aid for Special Purposes, Hokkaido University, 18K19952
• Establishment of an immediate determination method for indicators on eruption scale and strength using data of typical volcano monitoring instruments and weather radars
  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research
  Apr. 2016 - Mar. 2018
  NAKAMICHI Haruhisa; OISHI Satoru; YAMADA Taishi; TERADA Akihiko
  We obtained the seismic and acoustic energies and durations of 2014 and 2015 eruptions of Kuchinoerabujima. We estimated the altitude of the eruption plume by a force at the seismic source and compare with the plume altitude by visual observation for the 2015 eruption. We compared seismic waveforms and tilt changes of eruptions in Japan and clarified common features of the eruptions of Kusatsushiranesan, Ontakesan and Kuchinoerabujima.
  We detected the radar reflection intensity corresponding to eruption plumes of Sakurajima and Shinmoedake. We estimated the plume height of the Sakurajima eruption on November 13, 2017 as 4 km by using the radar reflection intensity, although the visual plume height was unknown due to bad weather. By comparing the radar reflection intensities of the 2017 and 2018 eruptions of Shinmoedake with the plume altitudes by visual observation, we accumulated the basic data for establishing a method for estimating altitudes of eruption plumes using weather radars.
  Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Kyoto University, 16K12849
• 広域地震観測網を用いた泥流検知手法の試験および評価
  研究助成
  Jun. 2015 - Mar. 2016
  青山 裕
  北海道河川財団, Principal investigator, Competitive research funding
• Joint research of Japan and Russia for investigation of magma system and its eruption mechanism of the arc-type basaltic eruptive activity
  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
  01 Apr. 2010 - 31 Mar. 2014
  NAKAGAWA Mitsuhiro; TAKAHASHI Hiroaki; MATSUSHIMA Takeshi; MIYAMACHI Hiroki; HASEGAWA Takeshi; AOYAMA Hiroshi; ISHIZUKA Yoshihiro; MIYAGI Yousuke
  Geophysical, geological and petrological research of Klyuchevskoy volcano, Kamchatka, was carried out. We installed four tiltmeters to construct the network with seismographs for monitoring of activity of the volcano. We have also continued to maintain the network, which has been working during our research period. Continuous tilt measurements detected cyclic deformation with every 10 - 20 minutes. This monitoring result enables to construct the model for the Strombolian type eruptions. On the other hand, petrological and geochemical analysis reveals that eruptive materials during the last 3000 years can be divided into two types of basaltic magma, one of which had been gradually replaced by another type of basaltic magma. In addition, although eruptive activity has continued intermittently during the last 80 years, magma system beneath the volcano has changed after each dormant period.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 22253005
• A study for enhancement of predicting volcanic eruptions and revealing properties of a host medium of magmatic activities in Usu volcano, Japan
  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
  2007 - 2009
  ONIZAWA Shinya; OSHIMA Hiromitsu; AOYAMA Hiroshi; MAEKAWA Tokumitsu; SUZUKI Atsuo
  Volcanic phenomena observed in four eruptions during the 20th century were compiled and characteristics of precursory seismic activities of these eruptions were compared, in order to enhance short term prediction of volcanic eruptions. We showed similarities of earlier stage of the precursory activities between the summit and flank eruptions, while there exist unique activities only before the flank eruptions. For long term prediction, seismic activities and ground deformations in dormant period were investigated. The seismic activities beneath the summit are caused by subsidence of the 1977-82 crypto-dome. Beneath Usu volcano, the basement layer gets shallower toward the north. Northward and southward migrating seismic activities before the 2000 eruption occurred along the dipping basement, suggesting the activities were constrained by the subsurface structure. Asymmetric patterns of ground deformations caused by lava and crypto-domes were related to the subsurface basement structure. Furthermore, subsurface velocity structure of Hokkaido-Komagatake volcano was revealed for future comparative studies, and a high velocity region was detected beneath the summit.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), National Institute of Advanced Industrial Science and Technology, 19510185
• 火山観測用3次元可視画像撮影装置の開発
  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Priority Areas
  2005 - 2006
  青山 裕
  2006年度は試作機で得られた成果をもとにして,無線装置の作成を進めた.複数受信点への同報性に優れた無線装置を用いることで,トリガー発生装置とカメラの配置を自由に取ることができ,ステレオ撮影で重要となる視点間距離を大きくすることができる.また,撮影するカメラの台数も理論上は無制限に増やすことが可能となる.しかしその一方で,有線系システムでは現れなかった同期信号の遅延が生じることが予想された.
  装置作成においては(有)ユニテクノ研究開発部の石川和也氏にご協力をいただいた.ユニテクノ製の特定小電力無線伝送装置は,送受信機間の距離を約2kmまで広げられることの他に,信号伝達の時間遅れがミリ秒の精度で一定となっているという特徴がある.この時間遅れ精度の保証は,カメラ同士の撮影時刻同期精度を保つ上で非常に有用である.無線同期装置のベースとしてユニテクノ製UM3型無線装置を利用した.本研究ではUM3型無線装置を1対Nの組み合わせで利用し,送信機側にGPS同期のパルス発生装置やトリガー信号のコントローラーを組み入れた.受信機側には2005年度の有線系試作時に作成済みのシャッター信号/カウンター信号分離装置を接続し,その先にカメラと収録用PCがつながれることとなる.
  撮影時刻の精度を高める目的で,送信機側にGPSモジュールを搭載した.送信機は起動後のスタンバイ状態でGPS時計との同期動作を開始し,スタートボタン押下後の毎分0秒から設定されたシャッタースピードで同期信号を送出する.無線伝送による遅延時間のゆらぎを低減するために,固定データ長の固定周期で同期シャッター信号を送信する.データ送信は30fpsに相当する33.3ms毎(誤差±400μs以内)に行われる.
  機器の細部調整は若干残っているが,予定年度内に計画通りの撮影装置の作成を完了することができた.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Priority Areas, Hokkaido University, 17031001

• 最近話題になった十勝岳の火山現象について
  17 Dec. 2020
  Lecturer
  十勝岳火山防災協議会
  十勝岳噴火総合防災訓練に伴う関係機関調整会議
  Governmental agency
• 火山で観測した信号のおもしろさ
  15 Dec. 2020
  Lecturer
  札幌管区気象台
  札幌管区気象台 火山防災業務職員研修
  Governmental agency
• 火山災害
  01 Nov. 2020
  Lecturer
  防災士研修センター
  防災士研修講座
  General, Governmental agency
• 北海道大学の火山観測施設
  20 Aug. 2019
  Lecturer
  北海道駒ヶ岳火山防災協議会
  協議会総会
  森町福祉センター
  Governmental agency
• 火山で観測した信号のおもしろさ
  22 Jul. 2019
  Lecturer
  札幌管区気象台
  火山防災業務職員研修
  札幌管区気象台
  Governmental agency
• 有珠山 -20世紀の4回の噴火と火山学的研究-
  10 Jun. 2019
  Lecturer
  JICA 2019年度中南米地域火山防災能力強化研修
  JICA札幌
  Researchers, Governmental agency
• 火山で観測した信号のおもしろさ
  09 Jul. 2018
  Lecturer
  札幌管区気象台
  火山防災業務職員研修
  札幌管区気象台
  Governmental agency
• 有珠山 -20世紀の4回の噴火と火山学的研究-
  09 Jun. 2017
  Lecturer
  JICA
  2017年度中南米地域火山防災能力強化研修
  JICA札幌
  Others
• 北海道の活動的火山における噴火予知研究観測の課題
  26 Aug. 2016
  Lecturer
  洞爺湖有珠火山マイスター運営委員会
  洞爺湖有珠火山マイスター養成講座
  伊達市防災センター
  Civic organization
• 有珠山 -20世紀の4回の噴火と火山学的研究-
  10 Jun. 2016
  Lecturer
  JICA
  2016年度中南米地域火山防災能力強化研修
  JICA札幌
  Others
• 有珠山 -20世紀の4回の噴火と火山学的研究-
  16 Jun. 2014
  Lecturer
  JICA
  2014年度中南米地域火山防災能力強化研修
  JICA札幌
  Others
• 有珠山 -20世紀の4回の噴火と火山学的研究-
  14 Jun. 2013
  Lecturer
  JICA
  2013年度中南米地域火山防災能力強化研修
  JICA札幌
  Others
• 有珠山 -20世紀の4回の噴火と火山学的研究-
  18 Jun. 2012
  Lecturer
  JICA
  2012年度中南米地域火山防災能力強化研修
  JICA札幌
  Others
• 新燃岳の火山観測体制と道内火山の観測例
  03 Feb. 2012
  Lecturer
  北海道防災会議
  地震火山対策部会火山専門委員会
  北海道立道民活動センター[かでる２．７]
  Governmental agency
• 有珠山 -20世紀の4回の噴火と火山学的研究-
  20 Jun. 2011
  Lecturer
  JICA
  2011年度中南米地域火山防災能力強化研修
  JICA札幌
  Others
• 有珠山 -20世紀の4回の噴火と火山学的研究-
  17 Jul. 2010
  Lecturer
  JICA
  2010年度中南米地域火山防災能力強化研修
  JICA札幌
  Others

• Mar. 2014 - Mar. 2014
  北海道における火山に関する研究報告書・第15編 十勝岳火山地質・噴火史・活動の現況および防災対策 第II版
• Mar. 2004 - Mar. 2004
  日本の火山性地震・微動のデータベース