Generation Process of Strong Ground Motion Considering Three-Dimensioal Source Fault Geometry and Underground Structure

• Project/Area Number: 22710172
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Natural disaster science
• Research Institution: Kyoto University
• Principal Investigator: ASANO Kimiyuki 京都大学, 防災研究所, 助教 (80452324)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 地震 / 強震動 / 震源破壊過程 / 震源断層 / 強震動生成領域 / 三次元地下構造 / 地下構造 / 2011年東北地方太平洋沖地震 / 2008年岩手・宮城内陸地震

Research Abstract

This project focuses on two important “three-dimensional effects” related to strong ground motion generation during earthquakes: the three-dimensional geometry of the source fault and the three-dimensional velocity structure model. New kinematic source inversion analysis method isdeveloped to estimate the spatiotemporal slip distribution together with unknown fault geometry from observed strong motion records. Theoretical Green’s functions simulated from the present nation-wide three-dimensional crustal velocity structure models are compared with the observed inter-station Green’s functions deduced by the seismic interferometry technique. The source model composed of four Strong Motion Generation Areas of the 2011 Tohoku earthquake is estimated considering the three-dimensional geometry of the plate interface.

Research Products

• [Journal Article] estimated from the joint inversion of strong-motion and GPS data: Relationship with seamount and Philippine Sea Plate 、 Geophysical Research Letters (2013)
  • Author(s): Kubo, H, K. Asano, and T. Iwata
  • Journal Title: Source-rupture process of the 2011 Ibaraki-oki, Japan, earthquake (Mw7.9) Volume: 40巻 Issue: 12 Pages: 3003-3007
  • DOI: 10.1002/grl.50558
  • Peer Reviewed
• [Journal Article] Source model for strong ground motion generation in the frequency range 0.1-10 Hz during the 2011 Tohoku earthquake (2012)
  • Author(s): Asano, K. and T. Iwata
  • Journal Title: Earth, Space and Planets Volume: 64巻 Pages: 1111-1123
  • NAID: 120006960301
  • Peer Reviewed
• [Journal Article] Broadband Strong Ground Motion Simulation of the 2011 Tohoku, Japan, Earthquake (2012)
  • Author(s): Asano, K. and T. Iwata
  • Journal Title: Proceedings of the 15th World Conference on Earthquake Engineering Pages: 934-934
  • Peer Reviewed
• [Journal Article] Source model for strong ground motion generation in the frequency range 0.1-10 Hz during the 2011 Tohoku earthquake (2012)
  • Author(s): Asano, K. and T. Iwata
  • Journal Title: Earth, Planets and Space Volume: Vol.64 Issue: 12 Pages: 1111-1123
  • DOI: 10.5047/eps.2012.05.003
  • NAID: 120006960301
  • Peer Reviewed
• [Journal Article] Earthquake Estimated by the Joint Inversion of Strong Motion and GPS Data、Bulletin of the Seismological Society of America (2011)
  • Author(s): Asano, K. and T. Iwata
  • Journal Title: Source Rupture Process of the 2007 Noto Hanto Volume: 101巻 Issue: 5 Pages: 2467-2480
  • DOI: 10.1785/0120100254
  • Peer Reviewed
• [Journal Article] Estimation of Interstation Green's Functions in the Long-Period Range (2-10s) from Continuous Records of F-net Broadband Seismograph Network in Southwestern Japan (2011)
  • Author(s): Asano, K., A. Iwaki, and T. Iwata
  • Journal Title: Proceedings of the 4th IASPEI/IAEE International Symposium on the Effect of Surface Geology on Seismic Motion Volume: 2 Pages: 21-21
• [Journal Article] 地震波干渉法による西日本の地殻速度構造(1)-表面波群速度の推定- (2010)
  • Author(s): 山下佳穂里・浅野公之・岩田知孝
  • Journal Title: 京都大学防災研究所年報 Volume: 53 Pages: 175-180
  • NAID: 120002515161
• [Presentation] Source Model of Huge Subduction Earthquakes for Strong Ground Motion Prediction (2012)
  • Author(s): Iwata, T. and K. Asano
  • Organizer: American Geophysical Union 2012 Fall Meeting
  • Place of Presentation: アメリカ合衆国サンフランシスコ市モスコーンセンター
  • Year and Date: 2012-12-05
• [Presentation] 広帯域強震動からみた2011年東北地方太平洋沖地震の震源像 (2012)
  • Author(s): 浅野公之・岩田知孝
  • Organizer: 平成23年度京都大学防災研究所研究発表講演会
  • Place of Presentation: 京都大学(京都府)
  • Year and Date: 2012-02-22
• [Presentation] Source Model of Huge Subduction Earthquakes for Strong Ground Motion Prediction (2012)
  • Author(s): Iwata, T. and K. Asano
  • Organizer: アメリカ地球物理学連合２０１２年秋季大会
  • Place of Presentation: モスコーンセンター（アメリカ合衆国・サンフランシスコ市）
• [Presentation] Strong Ground Motion Generation during the 2011 Tohoku-Oki Earthquake (2011)
  • Author(s): Asano, K. and T. Iwata
  • Organizer: American Geophysical Union 2011 Fall Meeting
  • Place of Presentation: アメリカ合衆国サンフランシスコ市モスコーンセンター
  • Year and Date: 2011-12-08
• [Presentation] Strong Ground Motion Generation during the 2011 Tohoku-Oki Earthquake (2011)
  • Author(s): Asano, K., T.Iwata
  • Organizer: American Geophysical Union 2011 Fall Meeting
  • Place of Presentation: サンフランシスコ(アメリカ合衆国)
  • Year and Date: 2011-12-08
• [Presentation] 2011 年東北地方太平洋沖地震の広帯域強震動生成と震源破壊過程の関係 (2011)
  • Author(s): 浅野公之・岩田知孝
  • Organizer: 日本地震学会 2011 年秋季大会
  • Place of Presentation: 静岡コンベンションアーツセンター
  • Year and Date: 2011-10-12
• [Presentation] 2011年東北地方太平洋沖地震の広帯域強震動生成と震源破壊過程の関係 (2011)
  • Author(s): 浅野公之・岩田知孝
  • Organizer: 日本地震学会2011年秋季大会
  • Place of Presentation: グランシップ(静岡県)
  • Year and Date: 2011-10-12
• [Presentation] Estimation of Interstation Green's Functions in the Long-Period Range (2-10s) from Continuous Records of F-net Broadband Seismograph Network in Southwestern Japan (2011)
  • Author(s): Asano, K., A.Iwaki, T.Iwata
  • Organizer: 4th IASPEI/IAEE International Symposium on the Effect of Surface Geology on Seismic Motion
  • Place of Presentation: カリフォルニア大学サンバーバラ校(アメリカ合衆国)
  • Year and Date: 2011-08-25
• [Presentation] 経験的グリーン関数法による 2011 年東北地方太平洋沖地震の震源モデル (2011)
  • Author(s): 浅野公之・岩田知孝
  • Organizer: 日本地球惑星科学連合2011 年大会
  • Place of Presentation: 幕張メッセ国際会議場
  • Year and Date: 2011-05-26
• [Presentation] 経験的グリーン関数法による2011年東北地方太平洋沖地震の震源モデル (2011)
  • Author(s): 浅野公之・岩田知孝
  • Organizer: 日本地球惑星科学連合2011年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
  • Year and Date: 2011-05-26
• [Presentation] 震源インバージョン結果の不確かさに関する検討-2007 年のと半島地震を例に- (2011)
  • Author(s): 浅野公之・岩田知孝
  • Organizer: 日本地球惑星科学連合 2011 年大会
  • Place of Presentation: 幕張メッセ国際会議場
  • Year and Date: 2011-05-23
• [Presentation] 震源インバージョン結果の不確かさに関する検討-2007年能登半島地震を例に- (2011)
  • Author(s): 浅野公之・岩田知孝
  • Organizer: 日本地球惑星科学連合2011年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
  • Year and Date: 2011-05-23
• [Presentation] Analysis of Strong Ground Motion Records from the 2011 Off the Pacific Coast of Tohoku, Japan Earthquake (2011)
  • Author(s): Asano, K., and T. Iwata
  • Organizer: Seismological Society of America 2011 Annual Meeting
  • Place of Presentation: アメリカ合衆国メンフィス市メンフィスマリオット
  • Year and Date: 2011-04-15
• [Presentation] Analysis of Strong Ground Motion Records from the 2011 Off the Pacific Coast of Tohoku, Japan Earthquake (2011)
  • Author(s): Asano, T., T.Iwata
  • Organizer: Seismological Society of America 2011 Annual Meeting
  • Place of Presentation: メンフィス(アメリカ合衆国)
  • Year and Date: 2011-04-15
• [Presentation] Validation of Velocity Structure Model for Long-Period Ground Motion Simulation in Southwestern Japan Using Green's Functions Extracted by Seismic Interferometry (2011)
  • Author(s): Asano, K., A. Iwaki, and T. Iwata
  • Organizer: Seismological Society of America 2011 Annual Meeting
  • Place of Presentation: アメリカ合衆国メンフィス市メンフィスマリオット
  • Year and Date: 2011-04-13
• [Presentation] Validation of Velocity Structure Model for Long-Period Ground Motion Simulation in Southwestern Japan Using Green's Functions Extracted by Seismic Interferomerty (2011)
  • Author(s): Asano, K., A.Iwaki, T.Iwata
  • Organizer: Seismological Society of America 2011 Annual Meeting
  • Place of Presentation: メンフィス(アメリカ合衆国)
  • Year and Date: 2011-04-13
• [Presentation] Detailed Slip Distribution and Fault Geometry of the 2008 Iwate-Miyagi Nairiku, Northeast Japan (MW6.9) Earthquake Directly Obtained from Strong Motion Records (2010)
  • Author(s): Asano, K. and T. Iwata
  • Organizer: American Geophysical Union 2010 Fall Meeting
  • Place of Presentation: アメリカ合衆国サンフランシスコ市モスコーンセンター
  • Year and Date: 2010-12-16
• [Presentation] Detailed Slip Distribution and Fault Geometry of the 2008 Iwate-Miyagi Nairiku, Northeast Japan (M_W 6.9) Earthquake Directly Obtained from Strong Motion Records (2010)
  • Author(s): Asano, K., T.Iwata
  • Organizer: American Geophysical Union 2010 Fall Meeting
  • Place of Presentation: 米国サンフランシスコ市・モスコーンセンター
  • Year and Date: 2010-12-16
• [Presentation] 地震動予測用速度構造モデル検証のためのF-net 広帯域連続記録を用いた地震波干渉法による西南日本の地殻速度構造の推定(2) (2010)
  • Author(s): 浅野公之・岩田知孝・山下佳穂里
  • Organizer: 日本地震学会 2010 年秋季大会
  • Place of Presentation: 広島国際会議場
  • Year and Date: 2010-10-27
• [Presentation] 地震動予測用速度構造モデル検証のためのF-net広帯域連続記録を用いた地震波干渉法による西南日本の地殻速度構造の推定(2) (2010)
  • Author(s): 浅野公之・岩田知孝・山下佳穂里
  • Organizer: 日本地震学会2010年秋季大会
  • Place of Presentation: 広島市・広島国際会議場
  • Year and Date: 2010-10-27
• [Presentation] A Kinematic Slip Inversion Method Including Unknown Source Fault Geometry by Strong Motion Data (2010)
  • Author(s): Asano, K. and T. Iwata
  • Organizer: Workshop on Earthquake Source Dynamics 2010
  • Place of Presentation: スロバキア共和国シモレニツァ会議場
  • Year and Date: 2010-06-28
• [Presentation] A kinematic slip inversion method including unknown source fault geometry by strong motion data (2010)
  • Author(s): Asano, K., T.Iwata
  • Organizer: Workshop on Earthquake Source Dynamics 2010
  • Place of Presentation: スロバキア共和国・シモレニツァ会議場
  • Year and Date: 2010-06-28
• [Presentation] Source Model and Strong Motion Simulation of the 2009 Suruga Bay Earthquake, Japan (MJMA6.5) (2010)
  • Author(s): Asano, K. and T. Iwata
  • Organizer: Western Pacific Geophysics Meeting 2010
  • Place of Presentation: 中華民国台北市臺北國際會議中心
  • Year and Date: 2010-06-25
• [Presentation] Source Model and Strong Motion Simulation of the 2009 Suruga Bay Earthquake, Japan (M_<JMA> 6.5) (2010)
  • Author(s): Asano, K., T.Iwata
  • Organizer: Western Pacific Geophysics Meeting 2010
  • Place of Presentation: 台湾台北市・臺北國際會議中心
  • Year and Date: 2010-06-25
• [Presentation] 強震波形から震源断層形状と震源破壊過程を同時に推定する試み (2010)
  • Author(s): 浅野公之・岩田知孝
  • Organizer: 日本地球惑星科学連合 2010 年大会
  • Place of Presentation: 幕張メッセ国際会議場
  • Year and Date: 2010-05-24
• [Presentation] 強震波形から震源断層形状と震源破壊過程を同時に推定する試み (2010)
  • Author(s): 浅野公之・岩田知孝
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 千葉市・幕張メッセ国際会議場
  • Year and Date: 2010-05-24
• [Book] Chapter 3 Source Process of the 2011 Off the Pacific Coast of Tohoku Earthquake, Natural Disaster Science and Mitigation Engineering: DPRI Reports Vol.1 (2014)
  • Author(s): Asano, K., H. Sekiguchi, T. Iwata, W. Suzuki, S. Aoi, and T. Kunugi
  • Publisher: Springer
• [Book] Source Process of the 2011 Off the Pacific Coast of Tohoku Earthquake 、 Natural Disaster Science and Mitigation Engineering: DPRI Reports (2011)
  • Author(s): Asano, K., H. Sekiguchi, T. Iwata, W. Suzuki, S. Aoi, and T. Kunugi
  • Publisher: Springer