JAMSTEC Researchers Database

Last update :2018/09/17

  • Ryoichiro Agata
Department
Research Institute for Marine Geodynamics (IMG)　Subduction Dynamics Research Center (SDR)　Marine Seismology Research Group
Career
Resercher(II)

Profile

Speciality
Computational earthquake engineering, Solid earth science
ＨＰ
https://sites.google.com/view/agatar/home

Research Achievement

Peer reviewed publications (Belonging to JAMSTEC)

  • Ryoichiro Agata, Kazuya Shiraishi, Gou Fujie. Bayesian Seismic Tomography Based on Velocity-Space Stein Variational Gradient Descent for Physics-Informed Neural Network. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2023, 61, p. 1-17, doi: 10.1109/TGRS.2023.3295414
  • 西本 昌、谷 翼, 山本 優、縣 亮一郎、堀 高峰. 多様なシナリオを考慮した地震動評価と建物応答解析-千島海溝沿いの巨大地震を対象とした検討-. 大成建設技術センター報, 2022, 55, p. 1-8
  • R. Agata, R. Nakata, A. Kasahara, Y. Yagi, Y. Seshimo, S. Yoshioka, T. Iinuma. Bayesian Multi-Model Estimation of Fault Slip Distribution for Slow Slip Events in Southwest Japan: Effects of Prior Constraints and Uncertain Underground Structure. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2022, 127, 8, doi: 10.1029/2021JB023712
  • Shinji Yamashita, Yuji Yagi, Ryo Okuwaki, Kousuke Shimizu, Ryoichiro Agata, Yukitoshi Fukahata. Potency density tensor inversion of complex body waveforms with time-adaptive smoothing constraint. GEOPHYSICAL JOURNAL INTERNATIONAL, 2022, 231, 1, p. 91-107, doi: 10.1093/gji/ggac181
  • 西本 昌、山本 優、縣 亮一郎、藤田 航平、市村 強、堀 高峰. 震源特性の不確実性が長周期地震動に与える影響の分析・2016年熊本地震前震を対象とした検討. 大成建設技術センター報, 2021, 54, p. 1-6
  • Fumiaki Tomita, Takeshi Iinuma, Ryoichiro Agata, Takane Hori. Development of a Trans-dimensional Fault Slip Inversion for Geodetic Data. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2021, 126, doi: 10.1029/2020JB020991
  • Shinji Yamashita, Yuji Yagi, Ryo Okuwaki, Kousuke Shimizu, Ryoichiro Agata, Yukitoshi Fukahata. Consecutive Ruptures on a Complex Conjugate Fault System During the 2018 Gulf of Alaska Earthquake. Scientific Reports, 2021, 11, doi: 10.1038/s41598-021-85522-w
  • Takane Hori, Ryoichiro Agata, Tsuyoshi Ichimura, Kohei Fujita, Takuma Yamaguchi, 　Takeshi Iinuma. High fidelity elastic Green's functions for subduction zone models consistent with the global standard geodetic reference system. EARTH PLANETS AND SPACE, 2021, 73, doi: 10.1186/s40623-021-01370-y
  • Ryoichiro Agata, Amato Kasahara, Yuji Yagi. A Bayesian inference framework for fault slip distributions based on ensemble modeling of the uncertainty of underground structure : With a focus on uncertain fault dip. GEOPHYSICAL JOURNAL INTERNATIONAL, 2021, 225, 2, p. 1392-1411, doi: 10.1093/gji/ggab033
  • Masaru Nakano, Shane Murphy, Ryoichiro Agata, Yasuhiko Igarashi, Masato Okada, Takane Hori. Self-similar stochastic slip distributions on a non-planar fault for tsunami scenarios for megathrust earthquakes. Progress in Earth and Planetary Science, 2020, 7, doi: 10.1186/s40645-020-00360-0
  • Ryoichiro Agata, Takane Hori, Sylvain D. Barbot, Mamoru Hyodo and Tsuyoshi Ichimura. Quasi-static Simulation Method of Earthquake Cycles Based on Viscoelastic Finite Element Modeling. Mathematical Analysis of Continuum Mechanics and Industrial Applications III. CoMFoS 2018. Mathematics for Industry, Springer, Singapore, 2020, 34, doi: 10.1007/978-981-15-6062-0_11
  • Agata Ryoichiro. Introduction of covariance components in slip inversion of geodetic data following a non-uniform spatial distribution and application to slip deficit rate estimation in the Nankai Trough subduction zone. GEOPHYSICAL JOURNAL INTERNATIONAL, 2020, 221, 3, p. 1832-1844, doi: 10.1093/gji/ggaa116
  • Ryoichiro Agata, Sylvain D. Barbot, Kohei Fujita, Mamoru Hyodo, Takeshi Iinuma, Ryoko Nakata, Tsuyoshi Ichimura & Takane Hori. Rapid mantle flow with power-law creep explains deformation after the 2011 Tohoku mega-quake. Nature Communications, 2019, 10, doi: 10.1038/s41467-019-08984-7
  • Ryoichiro Agata, Takane Hori, Keisuke Ariyoshi, Tsuyoshi Ichimura. Detectability analysis of interplate fault slips in the Nankai subduction thrust using seafloor observation instruments. MARINE GEOPHYSICAL RESEARCH, 2019, doi: 10.1007/s11001-019-09380-y
  • Ryoichiro Agata, Tsuyoshi Ichimura, Takane Hori, Kazuro Hirahara, Chihiro Hashimoto, Muneo Hori. An adjoint-based simultaneous estimation method of the asthenosphere's viscosity and afterslip using a fast and scalable finite-element adjoint solver. GEOPHYSICAL JOURNAL INTERNATIONAL, 2018, 213, 1, p. 461-474
  • Tsuyoshi Ichimura, Ryoichiro Agata, Takane Hori, Kenji Satake, Kazuto Ando, Toshitaka Baba, Mueno Hori. Tsunami Analysis Method with High-Fidelity Crustal Structure and Geometry Model. Journal of Earthquake and Tsunami, 2017, 11, 05, p. 1750018-1-1750018-18
  • Takuma Yamaguchi, Tsuyoshi Ichimura, Yuji Yagi, Ryoichiro Agata, Takane Hori, Muneo Hori. Fast crustal deformation computing method for multiple computations accelerated by a graphics processing unit cluster. GEOPHYSICAL JOURNAL INTERNATIONAL, 2017, 210, 2, p. 787-800, doi: 10.1093/gji/ggx203
  • Tsuyoshi Ichimura, Ryoichiro Agata, Takane Hori, Kazuro Hirahara, Chihiro Hashimoto, Muneo Hori and Yukitoshi Fukahata. An elastic/viscoelastic finite element analysis method for crustal deformation using a 3-D island-scale high-fidelity model. GEOPHYSICAL JOURNAL INTERNATIONAL, 2016, 206, p. 114-129, doi: 10.1093/gji/ggw123

oral presentation(Belonging to JAMSTEC)

  • 縣 亮一郎・Sylvain Barbot ・藤田 航平・兵藤守・飯沼卓史・ 中田令子・市村強・堀高峰. 大規模非線形粘弾性有限要素法による沈み込み帯での地震後地殻変動計算. 日本応用数理学会 2018年 研究部会連合発表会, 2018
  • Mamoru Hyodo, Ryoichiro Agata, Tsuyoshi Ichimura, Takane Hori. Postseismic Process of Moderate and Large Interplate Earthquakes Within the Source Area of the Megathrust Earthquakes Along the Nankai Trough. AOGS 14th Annual Meeting, 2017, 2017

Poster presentation(Belonging to JAMSTEC)

  • R. Agata, T. Ichimura, M. Hyodo, S. Barbot and T. Hori. Quasi-static earthquake cycle simulation based on nonlinear viscoelastic finite element analyses. American Geophysics Union Fall Meeting, 2017
  • R. Agata, T. Ichimura, M. Hyodo, S. Barbot and T. Hori. 非線形粘弾性有限要素解析を用いた準静的地震サイクルシミュレーション手法の開発. 日本地震学会2018年度秋季大会, 2017
  • Ryoichiro AGATA, Tsuyoshi ICHIMURA, Mamoru HYODO, Sylvain BARBOT and Takane HORI. Quasi-static simulation method of earthquake cycles based on large-scale viscoelastic finite element analyses. AOGS 14th Annual Meeting, 2017
  • R. Agata, T. Ichimura, M. Hyodo, S. Barbot and T. Hori. 大規模粘弾性有限要素解析を用いた準静的な地震サイクルシミュレーション手法の開発. 日本地球惑星科学連合2017年大会, 2017
  • Ryoichiro AGATA, Tsuyoshi ICHIMURA, Mamoru HYODO, Sylvain BARBOT and Takane HORI. 地殻変動の有限要素計算を用いた地震サイクルシミュレーション. 土木学会応用力学シンポジウム, 2017