The elucidation of the nature of shallow interplate aseismic slip based on repeating earthquakes in United States and in the world

• Project/Area Number: 17KK0081
• Research Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research)
• Allocation Type: Multi-year Fund
• Research Field: Solid earth and planetary physics
• Research Institution: Tohoku University
• Principal Investigator: Uchida Naoki 東北大学, 理学研究科, 准教授 (80374908)
• Project Period (FY): 2018 – 2021
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000)
• Keywords: 小繰り返し地震 / 非地震性すべり / プレート境界地震 / スロースリップ / S-net / スロー地震 / 繰り返し地震 / サンアンドレアス断層 / 東北日本沈み込み帯 / プレート境界

Outline of Final Research Achievements

In this international joint research, I have investigated repeating earthquakes along the San Andreas fault and around the world to estimate the distribution of aseismic slip and to investigate the role of aseismic slip in earthquake occurrences. I stayed Geological Survey Canada for two weeks in 2019 and University of California, Berkeley for 11 months in 2020-2021. As a result of the research, the anisotropic structure of offshore Tohoku was revealed (Uchida Nakajima Wang et al., Nature Communications, 2021), new repeating earthquake selection program was developed and the distribution of repeating earthquakes in California and in the world was estimated. For the latter two achievements, paper and programs are now in preparation for publication.

Academic Significance and Societal Importance of the Research Achievements

プレート境界浅部は，巨大地震が発生するとともに，津波地震やスロー地震など様々なタイプの滑りが起こる．本研究ではその様な滑り過程が繰り返し地震によりある程度わかってきた東北沖と比較・検討するために，サンアンドレアス断層や世界全域で繰り返し地震活動の系統的探索を行った．本研究で開発したプログラムは世界のどこでも適用ができ，また得られた非地震性すべりの分布と時間変化は，これまで測地学的データを用いて得られた結果を補完する重要なデータとなる．

Research Products

• [Int'l Joint Research] University of California, Berkeley(米国) (2021)
  • Year and Date: 2021-01-21
• [Int'l Joint Research] Geogical Survey of Canada(カナダ) (2019)
  • Year and Date: 2019-08-18
• [Journal Article] Prevalence of updip rupture propagation in interplate earthquakes along the Japan trench (2022)
  • Author(s): Keisuke Yoshida, Naoki Uchida, Hisahiko Kubo, Ryota Takagi, Shiqing Xu,
  • Journal Title: Earth and Planetary Science Letters Volume: 578 Pages: 117306-117306
  • DOI: 10.1016/j.epsl.2021.117306
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A Decade of Lessons Learned from the 2011 Tohoku-oki Earthquake (2021)
  • Author(s): Uchida, N., R. Burgmann
  • Journal Title: Review of Geophysics Volume: 59
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Special issue,“Kurile arc subduction zone: View of great earthquake generation and disaster mitigation of related phenomena” (2021)
  • Author(s): Tanioka, Y., N. Uchida, A. R. Gusman, M. Shishikura, T. Nishimura
  • Journal Title: Earth, Planets and Space Volume: 73 Issue: 1
  • DOI: 10.1186/s40623-021-01456-7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Learning from a disastrous megathrust earthquake (2021)
  • Author(s): Uchida, N., R. Burgmann
  • Journal Title: Eos Volume: 102
  • DOI: 10.1029/2021eo159741
  • Open Access / Int'l Joint Research
• [Journal Article] A Decade of Lessons Learned from the 2011 Tohoku‐oki Earthquake (2021)
  • Author(s): Uchida N.、Burgmann R.
  • Journal Title: Reviews of Geophysics Volume: 0 Issue: 2 Pages: 0-0
  • DOI: 10.1029/2020rg000713
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Stagnant forearc mantle wedge inferred from mapping of shear-wave anisotropy using S-net seafloor seismometers (2020)
  • Author(s): Uchida Naoki、Nakajima Junichi、Wang Kelin、Takagi Ryota、Yoshida Keisuke、Nakayama Takashi、Hino Ryota、Okada Tomomi、Asano Youichi
  • Journal Title: Nature Communications Volume: 11 Issue: 1 Pages: 5676-5676
  • DOI: 10.1038/s41467-020-19541-y
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Deep slow-slip events promote seismicity in northeastern Japan megathrust (2020)
  • Author(s): Khoshmanesh Mostafa、Shirzaei Manoochehr、Uchida Naoki
  • Journal Title: Earth and Planetary Science Letters Volume: 540 Pages: 116261-116261
  • DOI: 10.1016/j.epsl.2020.116261
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Improvement on spatial resolution of a coseismic slip distribution using postseismic geodetic data through a viscoelastic inversion (2020)
  • Author(s): Tomita Fumiaki、Iinuma Takeshi、Ohta Yusaku、Hino Ryota、Kido Motoyuki、Uchida Naoki
  • Journal Title: Earth, Planets and Space Volume: 72 Issue: 1 Pages: 84-84
  • DOI: 10.1186/s40623-020-01207-0
  • Peer Reviewed / Open Access
• [Journal Article] 2019 M6.7 Yamagata-Oki earthquake in the stress shadow of 2011 Tohoku-Oki earthquake: Was it caused by the reduction in fault strength? (2020)
  • Author(s): Yoshida Keisuke、Uchida Naoki、Hiarahara Satoshi、Nakayama Takashi、Matsuzawa Toru、Okada Tomomi、Matsumoto Yoshiaki、Hasegawa Akira
  • Journal Title: Tectonophysics Volume: 793 Pages: 228609-228609
  • DOI: 10.1016/j.tecto.2020.228609
  • Peer Reviewed
• [Journal Article] Migration of shallow and deep slow earthquakes toward the locked segment of the Nankai megathrust (2020)
  • Author(s): Naoki Uchida, Ryota Takagi, Youichi Asano, Kazushige Obara
  • Journal Title: Earth and Planetary Science Letters Volume: 531 Pages: 115986-115986
  • DOI: 10.1016/j.epsl.2019.115986
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Estimation of the Orientations of the S‐net Cabled Ocean‐Bottom Sensors (2019)
  • Author(s): Ryota Takagi, Naoki Uchida, Takashi Nakayama, Ryosuke Azuma, Akira Ishigami, Tomomi Okada, Takeshi Nakamura, Katsuhiko Shiomi
  • Journal Title: Seismological Research Letters Volume: 90 Issue: 6 Pages: 2175-2187
  • DOI: 10.1785/0220190093
  • Peer Reviewed
• [Journal Article] Surface creep rate distribution along the Philippine fault, Leyte Island, and possible repeating of Mw~6.5 earthquakes on an isolated locked patch (2019)
  • Author(s): Fukushima, Y., M. Hashimoto, M. Miyazawa, N. Uchida, and T. Taira
  • Journal Title: Earth Planets and Space Volume: 71 Issue: 1 Pages: 118-118
  • DOI: 10.1186/s40623-019-1096-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Configuration and structure of the Philippine Sea Plate off Boso, Japan: constraints on the shallow subduction kinematics, seismicity, and slow slip events (2019)
  • Author(s): Ito Aki、Tonegawa Takashi、Uchida Naoki、Yamamoto Yojiro、Suetsugu Daisuke、Hino Ryota、Sugioka Hiroko、Obana Koichiro、Nakahigashi Kazuo、Shinohara Masanao
  • Journal Title: Earth, Planets and Space Volume: 71 Issue: 1 Pages: 111-111
  • DOI: 10.1186/s40623-019-1090-y
  • NAID: 120006767925
  • Peer Reviewed / Open Access
• [Journal Article] Repeating earthquakes and interplate coupling along the western part of the North Anatolian Fault (2019)
  • Author(s): Uchida N.、Kalafat D.、Pinar A.、Yamamoto Y.
  • Journal Title: Tectonophysics Volume: 769 Pages: 228185-228185
  • DOI: 10.1016/j.tecto.2019.228185
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The slow earthquake spectrum in the Japan Trench illuminated by the S-net seafloor observatories (2019)
  • Author(s): Nishikawa T.、Matsuzawa T.、Ohta K.、Uchida N.、Nishimura T.、Ide S.
  • Journal Title: Science Volume: 365 Issue: 6455 Pages: 808-813
  • DOI: 10.1126/science.aax5618
  • Peer Reviewed
• [Journal Article] Offshore Postseismic Deformation of the 2011 Tohoku Earthquake Revisited: Application of an Improved GPS‐Acoustic Positioning Method Considering Horizontal Gradient of Sound Speed Structure (2019)
  • Author(s): Honsho C.、Kido M.、Tomita F.、Uchida N.
  • Journal Title: Journal of Geophysical Research: Solid Earth Volume: 124 Issue: 6 Pages: 5990-6009
  • DOI: 10.1029/2018jb017135
  • Peer Reviewed / Open Access
• [Journal Article] Detection of repeating earthquakes and their application in characterizing slow fault slip (2019)
  • Author(s): Uchida Naoki
  • Journal Title: Progress in Earth and Planetary Science Volume: 6 Issue: 1 Pages: 40-40
  • DOI: 10.1186/s40645-019-0284-z
  • Peer Reviewed / Open Access
• [Journal Article] Along‐Strike Variation and Migration of Long‐Term Slow Slip Events in the Western Nankai Subduction Zone, Japan (2019)
  • Author(s): Takagi Ryota、Uchida Naoki、Obara Kazushige
  • Journal Title: Journal of Geophysical Research: Solid Earth Volume: not Issue: 4 Pages: 1-28
  • DOI: 10.1029/2018jb016738
  • Peer Reviewed / Open Access
• [Journal Article] Repeating Earthquakes (2019)
  • Author(s): Uchida Naoki、Burgmann Roland
  • Journal Title: Annual Review of Earth and Planetary Sciences Volume: 47 Issue: 1 Pages: 305-332
  • DOI: 10.1146/annurev-earth-053018-060119
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Distribution of creeping faults based on a global search of repeating earthquakes (2021)
  • Author(s): Uchida, N., R. Burgmann
  • Organizer: AGU 2021 Fall meeting
  • Int'l Joint Research
• [Presentation] 東北沖地震：10年間の研究のレビュー (2021)
  • Author(s): 内田直希, Roland Burgmann
  • Organizer: JpGU 2021
• [Presentation] The slow earthquake spectrum in the Japan Trench illuminated by the S-net seafloor observatories (2021)
  • Author(s): 西川 友章, 松澤 孝紀, 太田 和晃, 内田 直希, 西村 卓也, 井出 哲
  • Organizer: JpGU 2021
• [Presentation] Prevailing updip ruptures in small interplate earthquakes along the Japan Trench revealed from land-based and offshore observations (2021)
  • Author(s): 吉田 圭佑, 内田 直希, 久保 久彦, 高木 涼太, Xu Shiqing
  • Organizer: JpGU 2021
• [Presentation] 層学習による初動到達時刻を用いた地震検出の試み: S-netへの適用 (2021)
  • Author(s): 鈴木 琳大郎, 内田 直希, Zhu Weiqiang, 中山 貴史, 豊国 源知, 高木 涼太, 東 龍介, Beroza Gregory
  • Organizer: JpGU 2021
• [Presentation] nitiation of the M~9 earthquake cycle: the 2021 Miyagi-Oki Mw7.0 earthquake at the deep seismic/aseismic transition (2021)
  • Author(s): 吉田 圭佑, 松澤 暢, 内田 直希
  • Organizer: 日本地震学会 2021年秋季大会
• [Presentation] 2011年東北地方太平洋沖地震発生前の日本海溝沿いの低周波微動活動 (2020)
  • Author(s): 高橋 秀暢, 日野 亮太, 内田 直希, 東 龍介, 川 久保 晋, 太田 和晃, 篠原 雅尚
  • Organizer: 日本地震学会 2020年度秋季大会
• [Presentation] 2011年東北地方太平洋沖地震震源域およびその周辺での繰り返し地震の破壊伝播速度の時間変化 (2020)
  • Author(s): 立岩 和也, 岡田 知己, 内田 直希, 河野 俊夫
  • Organizer: 日本地震学会 2020年度秋季大会
• [Presentation] 2011年東北地方太平洋沖地震後に岩手県沖で発生した様々な繰り返し地震系列の破壊過程の時空間変化 (2020)
  • Author(s): 金 亜伊, 内田 直希
  • Organizer: 日本地震学会 2020年度秋季大会
• [Presentation] 日本海溝北部におけるスロースリップおよび津波地震のモデル化 (2020)
  • Author(s): 中田 令子, 内田 直希, 日野 亮太
  • Organizer: 日本地震学会 2020年度秋季大会
• [Presentation] Activities of low frequency tremors in Sanriku-Oki before the 2011 Tohoku-Oki earthquake (2020)
  • Author(s): 高橋 秀暢, 日野 亮太, 内田 直希, 太田 和晃, 篠原 雅尚, 東 龍介, 川久保 晋
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Head and tail of massive earthquakes: Mechanism arresting growth of interplate earthquakes (2020)
  • Author(s): 日野 亮太, 内田 直希, 篠原 雅尚, 伊藤 喜宏, 飯沼 卓史, 中村 恭之, 金松 敏也, 池原 研, 中田 令子
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] 陸上臨時地震観測で見た2019年山形県沖の地震 (2) (2020)
  • Author(s): 岡田 知己, 田上 綾香, 水田 達也, 酒井 慎一, 吉田 圭佑, 内田 直希, 中山 貴史, 平原 聡, 松澤 暢
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] 2011年東北地方太平洋沖地震後に岩手県沖で発生した様々な繰り返し地震系列の破壊過程の比較 (2020)
  • Author(s): 金 亜伊, 内田 直希
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] 東北地方太平洋沖で発生した小中地震の破壊伝播指向性と応力降下量： S-netを用いた解析 (2020)
  • Author(s): 吉田 圭佑, 高木 涼太, 内田 直希, 池田 里奈
  • Organizer: JpGU-AGU Joint Meeting 2020, VIRTUAL MEETING
  • Int'l Joint Research
• [Presentation] 2011年東北地方太平洋沖地震による繰り返し地震の震源パラメータ変化 (2020)
  • Author(s): 立岩 和也, 岡田 知己, 内田 直希, 河野 俊夫
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Evaluation of deep-neural-network-based seismic arrival-time picking method for S-net data (2020)
  • Author(s): 鈴木 琳大郎, 内田 直希
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Mw6.5 Repeater Along a Creeping Section of the Philippine Fault? (2019)
  • Author(s): Yo Fukushima, Manabu Hashimoto, Masatoshi Miyazawa, Naoki Uchida, Taka'aki Taira
  • Organizer: American Geophysical Union 2019 Fall Meeting
  • Int'l Joint Research
• [Presentation] Clustering of records of short-period ocean-bottom seismometers (2019)
  • Author(s): Hidenobu Takahashi, Ryota Hino, Yusaku Ohta, Naoki Uchida, Syuichi Suzuki, Masanao Shinohara
  • Organizer: American Geophysical Union 2019 Fall Meeting
  • Int'l Joint Research
• [Presentation] Forearc trench-parallel anisotropy above a subducting plate revealed by the S-net ocean-bottom seismometers (2019)
  • Author(s): Naoki Uchida, Junichi Nakajima, Ryota Takagi, Keisuke Yoshida, Takashi Nakayama, Ryota Hino, Tomomi Okada, Youichi Asano, Sachiko Tanaka
  • Organizer: American Geophysical Union 2019 Fall Meeting
  • Int'l Joint Research
• [Presentation] Seafloor sediment thickness below S-net observatories offshore of the east Japan revealed from PS conversion wave at the sedimentary basement (2019)
  • Author(s): Ryosuke Azuma, Ryota Takagi, Genti Toyokuni, Takashi Nakayama, Syuichi Suzuki, Makiko Sato, Naoki Uchida, Ryota Hino
  • Organizer: American Geophysical Union 2019 Fall Meeting
  • Int'l Joint Research
• [Presentation] Deep slow-slip events promote seismicity in northeastern Japan subduction zone (2019)
  • Author(s): Khoshmanesh, M, M. Shirzaei, N. Uchida
  • Organizer: American Geophysical Union 2019 Fall Meeting
  • Int'l Joint Research
• [Presentation] 短周期OBSデータのクラスタ解析による低周波微動検出の試み (2019)
  • Author(s): 高橋 秀暢, 日野 亮太, 太田 雄策, 内田 直希, 鈴木 秀市, 篠原 雅尚
  • Organizer: 日本地震学会2019年度秋季大会
• [Presentation] 2011年東北沖地震による繰り返し地震の震源パラメータ変化（２） (2019)
  • Author(s): 立岩 和也, 岡田 知己, 河野 俊夫, 内田 直希
  • Organizer: 日本地震学会2019年度秋季大会
• [Presentation] 2011年東北地方太平洋沖地震後に岩手県沖で発生した様々な繰り返し地震系列の破壊過程 (2019)
  • Author(s): 金 亜伊, 内田 直希
  • Organizer: 日本地震学会2019年度秋季大会
• [Presentation] Configuration and structure of the Philippine Sea plate off Boso, Japan (2019)
  • Author(s): 伊藤 亜妃, 利根川 貴志, 内田 直希, 山本 揚二朗, 末次 大輔, 日野 亮太, 杉岡 裕子, 尾鼻 浩一郎, 中東 和夫, 篠原 雅尚
  • Organizer: 日本地震学会2019年度秋季大会
• [Presentation] 陸上臨時地震観測で見た2019年山形県沖の地震 (2019)
  • Author(s): 岡田 知己, 酒井 慎一, 吉田 圭佑, 内田 直希, 中山 貴史, 平原 聡, 松澤 暢, 日野 亮太, 篠原 雅尚, Sibson Richard
  • Organizer: 日本地震学会2019年度秋季大会
• [Presentation] S-net により推定された前弧上盤の海溝平行の速度異方性 (2019)
  • Author(s): 内田 直希, 中島 淳一, 高木 涼太, 吉田 圭佑, 日野 亮太, 岡田 知己, 浅野 陽一, 田中 佐千子
  • Organizer: 日本地震学会2019年度秋季大会
• [Presentation] P and S wave tomography of the NE Japan forearc region using S-net data (2019)
  • Author(s): 豊国 源知, 趙 大鵬, 内田 直希, 中山 貴史
  • Organizer: 日本地震学会2019年度秋季大会
• [Presentation] Creep rates along the Philippine fault, Leyte Island, and possible repeating of Mw6.5 earthquakes on an isolated locked patch (2019)
  • Author(s): 福島 洋, 橋本 学, 宮澤 理稔, 内田 直希, 平 貴明
  • Organizer: 日本地震学会2019年度秋季大会
• [Presentation] 関東地方におけるスロースリップイベントの系統的検出の試み (2019)
  • Author(s): 高木 涼太, 内田 直希, 小原 一成
  • Organizer: 日本地震学会2019年度秋季大会
• [Presentation] Seismic imaging of the eastern Japan forearc region using S-net data (2019)
  • Author(s): 豊国 源知, 趙 大鵬, 内田 直希, 中山 貴史
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] 加速度計記録を用いたS-netのセンサー姿勢・方位推定と地殻変動検出可能性の検討 (2019)
  • Author(s): 高木 涼太, 内田 直希, 中山 貴史, 東 龍介, 石上 朗, 岡田 知己, 太田 雄策, 日野 亮太
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] Possible tectonic tremor activities near the VLFE epicenters in the Sanriku-Oki region in 2011 (2019)
  • Author(s): 高橋 秀暢, 日野 亮太, 太田 雄策, 内田 直希, 鈴木 秀市, 篠原 雅尚, 松澤 孝紀
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] Tectonic tremor catalog in the Tohoku-Hokkaido-Oki region using S-net (2019)
  • Author(s): 井出 哲, 西川 友章, 松澤 孝紀, 太田 和晃, 内田 直希, 西村 卓也
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] 2011年東北沖地震による繰り返し地震の震源パラメータ変化 (2019)
  • Author(s): 立岩 和也, 岡田 知己, 河野 俊夫, 内田 直希
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] 東北地方太平洋沖地震後の繰り返し地震活動：海陸地震観測網による検討 (2019)
  • Author(s): 内田直希, 高木涼太, 平原聡, 中山貴史, 松澤暢, 田中佐千子, 浅野陽一
  • Organizer: 地球惑星科学連合2019年大会
• [Presentation] S-netを用いた東北日本前弧海域下のS波スプリッティング解析 (2019)
  • Author(s): 内田 直希, 中島 淳一, 高木 涼太, 吉田 圭佑, 中山 貴史, 日野 亮太, 岡田 知己, 浅野 陽一, 田中 佐千子
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] S-netを用いた初動読み取りと震源決定 (2019)
  • Author(s): 岡田 知己, 高木 涼太, 中山 貴史, 鈴木 秀市, 東 龍介, 豊国 源知, 吉田 圭佑, 内田 直希, 日野 亮太
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] 堆積層基盤PS変換波の走時解析に基づく日本・千島海溝域の堆積層厚さ分布 (2019)
  • Author(s): 東 龍介, 豊国 源知, 高木 涼太, 鈴木 秀市, 佐藤 真樹子, 中山 貴史, 内田 直希, 日野 亮太
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] S-netを用いた海域総合解析 (2019)
  • Author(s): 内田 直希, 東 龍介, 石上 朗, 岡田 知己, 高木 涼太, 豊国 源知, 海野 徳仁, 太田 雄策, 佐藤 真樹子, 鈴木 秀市, 高橋 秀暢, 立岩 和也, 趙 大鵬, 中山 貴史, 長谷川 昭, 日野 亮太, 平原 聡, 松澤 暢, 吉田 圭佑
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] Episodic slow slip after the 2011 Tohoku-oki earthquake: estimation from repeating earthquakes, very low frequency earthquakes, and seafloor geodetic measurements (2019)
  • Author(s): Naoki Uchida, Chie Honsho, Fumiaki Tomita, Takanori Matsuzawa, Roland Burgmann
  • Organizer: EGU General Assembly
  • Int'l Joint Research
• [Remarks] UCHIDA's Page
  • URL: http://www.aob.gp.tohoku.ac.jp/~uchida/