Achievements 2021

Mass Media


  • Yamashita, F., E. Fukuyama, and S. Xu(2022), Foreshock Activity Promoted by Locally Elevated Loading Rate on a 4‐m‐Long Laboratory Fault, Journal of Geophysical Research: Solid Earth,127
  • Kameda, J.and Y. Hamada (2022), Stick-slip behavior of a clayey crustal fault, Physical Review Research, 4, 013211
  • Yamanaka, Y., S. Kurata, K. Yano, F. Komaki, T. Shiina and A. Kato(2022), Structured regularization based velocity structure estimation in local earthquake tomography for the adaptation to velocity discontinuities, Earth, Planets and Space, 74
  • Jiang, F., H. Liu, X. Chen and T. Tsuji(2022), Acoupled LBM-DEM method for simulating the multiphase fluid-solid interaction problem, Journal of Computational Physics, 454
  • Itoh, Y. and Y. Aoki(2022), On the performance of position-domain sidereal filter for 30-s kinematic GPS to mitigate multipath errors, Earth Planets Space, 74
  • Takemura, S., K. Obara, K. Shiomi and S. Baba(2022), Spatiotemporal variations of shallow very low frequency earthquake activity southeast off the Kii Peninsula, along the Nankai Trough, Japan, Journal of Geophysical Research: Solid Earth, 127
  • Hashimoto, Y., S. Sato, G. Kimura, M. Kinoshita, A. Miyakawa, G. F. Moore, M. Nakano, K. Shiraishi, and Y. Yamada(2022), Décollement geometry controls on shallow very low frequency earthquakes, Scientific reports, 284130
  • Tonegawa, T., E. Araki, H. Matsumoto, T. Kimura, K. Obana, G. Fujie, R. Arai, K. Shiraishi, M. Nakano, Y. Nakamura, T. Yokobiki and S. Kodaira(2022), Extraction of P wave from ambient seafloor noise observed by distributed acoustic sensing, Geophysical Research Letters, 49     
  • Tonegawa, T., S. Takemura, S. Yabe, K. Yomogida(2022), Fluid migration before and during slow earthquakes in the shallow Nankai subduction zone,  Journal of Geophysical Research: Solid Earth, 127
  • Sawayama, K., T. Ikeda, T. Tsuji, F. Jiang, O. Nishizawa, and Y. Fujimitsu(2022), Elastic Wave Velocity Changes Due to the Fracture Aperture and Density, and Direct Correlation With Permeability: An Energetic Approach to Mated Rock Fractures,  Journal of Geophysical Research, 127
  • Uno, M., K.Koyanagawa, H. Kasahara, A. Okamoto and N. Tsuchiya(2022), Volatile-consuming reactions fracture rocks and self-accelerate fluid flow in the lithosphere, Proceedings of the National Academy of Sciences, 119
  • Tsuchiyama, A., T. A. Taira, J. Nakajima and R. Bürgmann(2022),  Emergence of Low‐Frequency Aftershocks of the 2019 Ridgecrest Earthquake Sequence, Bulletin of the Seismological Society of America Search
  • Seshimo, Y., and S. Yoshioka(2022), Spatiotemporal slip distributions associated with the 2018–2019 Bungo Channel long‑term slow slip event inverted from GNSS data, Scientific Reports, 12
  • Zhao, Qi., Y. Y. Yan, S. Tonai and N. Tomioka(2022), Peter D. Clift, Meor H. Amir Hassan, Jasmi Hafiz Bin Abdul Aziz A new K-Ar illite dating application to constrain the timing of subduction in West Sarawak, Borneo,  Geological Society of America, 134
  • Matsuno, S., M. Uno, A. Okamoto, and N. Tsuchiya(2022),  Machine‑learning techniques for quantifying the protolith composition and mass transfer history of metabasalt, Scientific reports, 12, 1385
  • Okada, Y., T. Nishimura, T. Tabei, T. Matsushima and H. Hirose(2021),  Development of a detection method for short-term slow slip events using GNSS data and its application to the Nankai subduction zone, Earth, Planets and SpaceEarth, 74
  • Chow, B., Y. Kaneko and J. Townend(2022), Evidence for deeply-subducted lower-plate seamounts at the Hikurangi subduction margin: implications for seismic and aseismic behavior,  Journal of Geophysical Research: Solid Earth, 127
  • Perez-Silva, A., Y. Kaneko, M. Savage, L. Wallace, D. Li and C. Williams(2021), Segmentation of shallow slow slip events at the Hikurangi subduction zone explained by along-strike changes in the fault geometry and plate convergence rates,  Journal of Geophysical Research: Solid Earth, 127
  • Bassett, D.,  A.Arnulf, S. Henrys, D. Barker, H. V. Avendonk, N. Bangs, S. Kodaira, H. Seebeck, L. Wallace, A. Gase, T. Luckie, K. Jacobs, B. Tozer, R. Arai, D. Okaya, K. Mochizuki, G. Fujie and Y. Yamamoto(2022), Crustal Structure of the Hikurangi Margin From SHIRE Seismic Data and the Relationship between Forearc Structure and Shallow Megathrust Slip behavior, Geophysical Research Letters, 49
  • Miyakawa, A., A. Noda and H. Koge(2022),  Evolution of the geological structure and mechanical properties due to the collision of multiple basement topographic highs in a forearc accretionary wedge: insights from numerical simulations, Progress in Earth and Planetary Science, 9, Article number: 1
  • Xie, Z., Y. Cai, S. Yoshioka and D. Abe(2022),  Exploring the location of large earthquakes using fault stress accumulation—A case study upon MW9.0 Tohoku-Oki earthquake in Japan,  Chinese Journal of Geophysics (in Chinese), 65
  • Yamaoka, K. and S. R. Wallis(2022), Recognition of broad thermal anomaly around the median tectonic line in central Kii peninsula, southwest Japan: Possible heat sources, Island Arc, 31
  • Fukuda, K., T. Hatano and  K. Mochizuki(2022),  Model for tectonic tremors: Enduring events, moment rate spectrum, and moment-duration scaling,  Physical Review E, 105, 014124
  • Zhang, Y., F. Jiang and T. Tsuji(2022), Influence of pore space heterogeneity on mineral dissolution and permeability evolution investigated using lattice Boltzmann method, Chemical Engineering Science, 247
  • Shinohara, M.,  S. Sakai, T. Okada, H. Sato, Y. Yamashita, R. Hino, K. Mochizuki and T. Akuhara(2022), Precise aftershock distribution of the 2019 Yamagata‑oki earthquake using newly developed simple anchored‑buoy ocean bottom seismometers and land seismic stations, Earth, Planets and Space, 74
  • Hirauchi, K., Y. Nagata, K. Kataoka, R. Oyanagi, A. Okmoto and K. Michibayashi(2021), Cataclastic and crystal-plastic deformation in shallow mantle-wedge serpentinite controlled by cyclic changes in pore fluid pressures, Earth and Planetary Science Letters, 576
  • Chang, T., and S. Ide(2021), Hypocenter hotspots illuminated using a new cross-correlation-based hypocenter and centroid relocation method, Journal of Geophysical Research: Solid Earth, 126
  • Davy, R. G., L. Frahm, R. Bell, R. Arai, D. H. N. Barker, S. Henrys, N. Bangs, J. Morgan and M. Warner(2021), Generating High-Fidelity Reflection Images Directly From Full-Waveform Inversion: Hikurangi Subductino Zone Case Study,  Geophysical Research Letters, 48
  • Tsuji, T., T. Ikeda, R. Matsuura, K. Mukumoto, H.F. Lawrens, T. Kimura, K. Yamaoka and M. Shinohara(2021),  Continuous monitoring system for safe managements of CO2 storage and geothermal reservoirs, Scientific Reports, 11
  • Suzuki, A.,  M. Miyazawa, J. Minto, T. Tsuji, I. Obayashi, Y. Hiraoka and T. Ito(2021),  Flow estimation solely from image data through persistent homology analysis, Scientific Reports, 11
  • Kita, S., H. Houston, S. Yabe, S. Tanaka, Y. Asano, T. Shibutani and N. Suda(2021), Effects of episodic slow slip on seismicity and stress near a subduction-zone megathrust, Nature Communications ,1955480
  • Ide, S.(2021), Empirical Low-Frequency Earthquakes Synthesized From Tectonic Tremor Records, Journal of Geophysical Research: Solid Earth, 126
  • Mizushima, R. and T. Hatano(2021),  Slow periodic oscillation without radiation damping: new evolution laws for rate and state friction, Geophysical Journal International, 229, 274
  • Massaro, L., J. Adam, E. Jonade and Y. Yamada(2021), New granular rock-analogue materials for simulation of multi-scale fault and fracture processes, Geological Magazine, 1-24
  • Okuda, H., M.J. Ikari, A. Roesner, K. Stanislowski, A. Hüpers, A. Yamaguchi and  A.J. Kopf(2021), Spatial Patterns in Frictional Behavior of Sediments Along the Kumano Transect in the Nankai Trough, Journal of Geophysical Research: Solid Earth, 126
  • Zhu, W., Y. Ji, R. Qu, C. Xie, S. Yoshioka, and D. Zeng(2021), Thermal regime and slab dehydration beneath the Izu-Bonin arc: Implications for fast and slow subduction earthquakes, Terra Nova, 34
  • Akizawa, N., A. Yamaguchi, K. Tani, A. Ishikawa, R. Fujita and  S.H. Choi(2021), Highly refractory dunite formation at Gibbs Island and Bruce Bank, and its role in the evolution of the circum-Antarctic continent, The Canadian Mineralogist, 59
  • Ahmad, A.B. and T. Tsuji(2021),  Machine learning for automatic slump identification from 3D seismic data at convergent plate margins, Marine and Petroleum Geology, 133
  • Nimiya, H., T. Ikeda and T. Tsuji(2021), Temporal changes in anthropogenic seismic noise levels associated with economic and leisure activities during the COVID-19 pandemic, Scientific Reports, 11
  • Ando, I., Y. Mugita, K. Hirayama, S. Munetoh, M. Aramaki, F. Jiang, T. Tsuji, A. Takeuchi, M. Uesugi and Y. Ozaki(2021),  Elucidation of pore connection mechanism during ductile fracture of sintered pure iron by applying persistent homology to 4D images of pores: Role of open pore, Materials Science and Engineering: A, 828
  • Iwasaki, Y., K. Mochizuki, M.Ishise, E.K. Todd, S.Y. Schwartz, H. Zal, M.K. Savage, S. Henrys, A.F. Sheehan, Y. Ito, L.M. Wallace, S.C. Webb, T. Yamada and M. Shinohara(2021), Continuous Tremor Activity With Stable Polarization Direction Following the 2014 Large Slow Slip Event in the Hikurangi Subduction Margin Offshore New Zealand,  Journal of Geophysical Research, 127
  • Yokota, Y.,  T. Ishikawa,  S. Watanabe and Y. Nakamura(2021), Crustal deformation detection capability of the GNSS-A seafloor geodetic observation array (SGO-A),  provided by Japan Coast Guard, Progress in Earth and Planetary Science, 8,63
  • Shinohara, M., T. Yamada, H. Shiobara and  Y. Yamashita(2021), Development of a Compact Broadband Ocean Bottom Seismometer,  Seismological Research Letters, 92
  • Yoshida, K., N. Uchida, H. Kubo, R. Takagi and S. Xu(2021),  Prevalence of updip rupture propagation in interplate earthquakes along the Japan trench, Earth and Planetary Science Letters, 73
  • Takahashi, H., K. Tateiwa, K. Yano and M. Kano(2021), A convolutional neural network-based classification of local earthquakes and tectonic tremors in Sanriku-oki, Japan, using S-net data, Earth, Planets and Space, 73
  • Kano, M., A. Ikeuchi, T. Nishimura, S. Miyazaki and T. Matsushima(2021), Potential of megathrust earthquakes along the southern Ryukyu Trench inferred from GNSS data, Earth, Planets and Space, 73
  • Hartung, E., L. Caricchi, D. Floess, S. Wallis and S. Harayama(2021),  Establishing genetic relationships between the Takidani pluton and two large silicic eruptions in the Northern Japan Alps. Journal of Petrology, 62
  • Chhun, C., and T. Tsuji(2021), Pore pressure and gas saturation distribution in the forearc basin of the Nankai subduction zone inferred from high-resolution Vp and Vs,  Marine and Petroleum Geology, 205
  • Yoneshima, Y. and K. Mochizuki(2021),  Migration‐Based Local Event‐Location Workflow for Ocean‐Bottom Seismometer (OBS) Records in Subduction Zones: A Practical Approach for Addressing a Large Number of Events,  Bulletin of the Seismological Society of America,112
  • Yamashita, Y., M. Shinohara and T. Yamada(2021),  Shallow tectonic tremor activities in Hyuga-nada, Nankai subduction zone, based on long-term broadband ocean bottom seismic observations,  Earth, Planets and Space, 73
  • Suenaga, N., S. Yoshioka and Y. Ji(2021), 3-D thermal regime and dehydration processes around the regions of slow earthquakes along the Ryukyu Trench, Scientific Reports, 11
  • 巽 好幸・末永 伸明・吉岡 祥一・金子 克哉, 海惑星の将来を考える─マントル掘削の意義─ , 地学雑誌,  130
  • Okamoto, A., R. Oyanagi, K. Yoshida, M. Uno, H. Shimizu and M. Satish-Kumar(2021), Rupture of wet mantle wedge by self-promoting carbonation,  Communications Earth & Environments, 2
  • Yamashita, F., E. Fukuyama, S. Xu, H.Kawakata, K. Mizoguchi and S. Takizawa(2021), Two end-member earthquake preparations illuminated by foreshock activity on a meter-scale laboratory fault,  Nature Communications, 12
  • Shibata, R., N. Aso, G. Oikawa, J. Nakajima, and S. Ide(2021),  Potential applicability and limitations of radiation-corrected empirical Green’s functions for point-source cases, Geophysical Journal International, 229
  • Park, J.O., N. Takahata, E.J. Hondori, A. Yamaguchi, T. Kagoshima, T. Tsuru, G. Fujie, Y. Sun, J. Ashi, M. Yamano and Y. Sano(2021), Mantle-derived helium released through the Japan trench bend-faults, Scientific reports, 11
  • Ramirez, G., A. Smye, D.M. Fisher, Y. Hashimoto and A. Yamaguchi(2021), Constraints on element mobility during deformation within the seismogenic zone, Shimanto Belt, Japan, Geochemistry, Geophysics, Geosystems, 22
  • Shimura, Y., T. Tokiwa, H. Mori, M. Takeuchi and Y. Kouketsu(2021),  Deformation characteristics and peak temperatures of the Sanbagawa Metamorphic and Shimanto Accretionary complexes on the central Kii Peninsula, SW Japan, Journal of Asian Earth Sciences, 215
  • Kouketsu, Y., K. Sadamoto, H. Umeda, H. Kawahara, T. Nagaya, T. Taguchi,  H. Mori,  S. R. Wallis and M. Enami(2021), Thermal structure in subducted units from continental Moho depths in a palaeo subduction zone, the Asemigawa region of the Sanbagawa metamorphic belt, SW Japan,  Journal of Metamorphic Geology, 39
  • Nishiyama, N., K. Ujiie and M. Kano(2021), Spatial changes in inclusion band spacing as an indicator of temporal changes in slow slip and tremor recurrence intervals, Earth, Planets and Space, 73
  • Mitsui, Y., H. Muramatsu and Y. Tanaka(2021), Slow deformation event between large intraslab earthquakes at the Tonga Trench, Scientific Reports, 11
  • Kundu, S., A. Opris, Y. Yukutake and T. Hatano(2021), Extracting Correlations in Earthquake Time Series Using Visibility Graph Analysis, Frontiers in Physics, 9
  • Hirose, T., Y. Hamada, W. Tanikawa, N. Kamiya, Y. Yamamoto, T. Tsuji, M. Kinoshita, V. B. Heuer, F. Inagaki, Y. Morono and  Y. Kubo(2021),  High Fluid-Pressure Patches beneath the Decollement: A Potential Source of Slow Earthquakes in the Nankai Trough off Cape Muroto, Journal of Geophysical Research, 126
  • Mochizuki, K., S. Henrys, D. Haijima, E. Warren-Smith and B. Fry(2021), Seismicity and velocity structure in the vicinity of repeating slow slip earthquakes, northern Hikurangi subduction zone, New Zealand,  Earth and Planetary Science Letters, 563
  • Yamaya, L., K. Mochizuki, T. Akuhara and K. Nishida(2021),  Sedimentary structure derived from multi-mode ambient noise tomography with dense OBS network at the Japan Trench, Journal of Geophysical Research, 126
  • Yarce, J.,  A. Sheehan, S. Roecker and  K. Mochizuki(2021),  Seismic Velocity Heterogeneity of the Hikurangi Subduction Margin, New Zealand:Elevated Pore Pressures in a Region with Repeating Slow Slip Events, Journal of Geophysical Research, 126




  • Takashi Tonegawa, Earth, Planets and Space “2021 Highlighted Papers”, 2022 link
  • 渡邉俊一, 石川直史, 中村優斗, 横田裕輔 “令和3年, 度水路技術奨励賞”, 2022

Mass Media

  • 小原 一成, 松澤 孝紀, 日刊工業新聞, “3.11メッセージ/“地震学の敗北”から一転 「スロー地震」 解明進む”, 2022.3.11, link
  • 北 佐枝子, 日刊建設工業新聞, “防災減災 南海トラフ地震”, 2022.3.1
  • 宇野 正起, 日経産業新聞, “岩が水蓄える仕組み解明 東北大、CO2貯留に活用も”, 2022.2.7, link
  • 田中 愛幸, 中日新聞(北陸版), “珠洲群発地震の原因か 流体の動き 継続監視”, 2022.2.3, link
  • 田中 愛幸, 読売新聞(石川県版), “珠洲の地震 現地調査着手”, 2022.2.21
  • 宇野 正起, 日刊工業新聞, “岩石変質前の組成解明 機械学習で復元”, 2022.2.16, link
  • 田中 愛幸, NHK BSプレミアム「コズミックフロント」, “宇宙をひらく 究極の“時間”に迫れ!”, 2022.1.6, link
  • 宇野 正起, 日刊工業新聞, “地球深部の岩石破壊解明ー東北大 体積膨張反応が要因”, 2022.1.21, link
  • 北 佐枝子, 建設通信新聞, “ゆっくりすべり とスラブ内地震の連動 地下深部の水移動が原因”, 2021.12.22
  • 北 佐枝子, 建設工業新聞, “南海トラフ地震詳細な固着はがれ検出 共同研究論文,英国誌に掲載“, 2021.12.22
  • 北 佐枝子, プレスリリース(HP,筑波研究学園都市記者会および科学記者会), “南海トラフ地震の詳細な固着はがれの検出に成功!
    ~紀伊半島下の想定震源域でのスロースリップの”すべりの遅れ”を発見”, 2021.12.21および2022.1.6, link
  • 板場 智史, NHKおはよう日本, “スロースリップ 巨大地震の前ぶれつかめ”, 2021.12.12
  • 板場 智史, NHK和歌山放送局, ““スロースリップ” 巨大地震の前ぶれを探る”, 2021.11.17
  • 山口 飛鳥, 岩手日報ジュニアウイークリー, “メーユのさんりくゼミナール 第4回 海と陸が出合う三陸”, 2021.7.20
  • 山口 飛鳥, 岩手日報ジュニアウイークリー, “メーユのさんりくゼミナール 第3回 多様な地形 なぜできたの”, 2021.6.15
  • 山田 泰広, NHK BSプレミアム「コズミックフロント」, “付加体形成のモデル実験”, 2021.4.29, link