Quantification of the crust and mantle heterogeneity and construction of a simulation model for broadband strong ground motions

• Project/Area Number: 20540405
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: The University of Tokyo
• Principal Investigator: FURUMURA Takashi 東京大学, 大学院・情報学環, 教授 (80241404)
• Co-Investigator(Kenkyū-buntansha): NISHIMURA Takeshi 東北大学, 理学系研究科, 准教授 (40222187)
• Co-Investigator(Renkei-kenkyūsha): NISHIDA Kiwamu 東京大学, 地震研究所, 助教 (10345176)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 地震災害・予測 / 地震 / シミュレーション / 地殻 / 不均質構造 / 短波長不均質構造 / 並列計算 / 地震災害

Research Abstract

In this study we quantified the crust and mantle heterogeneity, and constructed a broadband strong ground motion simulation model. The distribution characteristic of the small-scale heterogeneities of the scale several kilometers or less in the subsurface structure is evaluated based the analysis of regional seismograms obtained by the Hi-net high-density seismic network from two points : 1) frequency dependency and the distance dependence of collapse of the apparent S-wave radiation pattern and 2) relative strength of the P-wave amplitude in the Transverse component. We developped a high-performance broadband simulation model and large scale simulation was conducted using the Earth Simulator supercomputer.

Research Products

• [Journal Article] A Tears or thinning? Subduction structures in the Pacific plate beneath the Japanese Islands Physics of the Earth and Planetare Interiors (2010)
  • Author(s): Kennett B.L.N., T.Furumura
  • Journal Title: Earth and Planetary Interiors Volume: 180 Pages: 52-58
  • Peer Reviewed
• [Journal Article] A scattering waveguide in the heterogeneous subducting plate, Advances in Geophysics, Scattering of Short-Period Seismic Waves in Earth Heterogeneity (2009)
  • Author(s): Furumura, T. and B. L. N. Kennett
  • Journal Title: Elsevier Volume: 50 Pages: 195-217
• [Journal Article] 差分法による3次元不均質場での地震波伝播の大規模計算 (2009)
  • Author(s): 古村孝志
  • Journal Title: 地震2 Volume: 61 Pages: 83-92
  • NAID: 10025364671
• [Journal Article] Distortion of the apparent S-wave radiation pattern in the high-frequency wavefield : Tottori-ken Seibu, Japan, earthquake of 2000 (2009)
  • Author(s): Takemura, S., T. Furumura and T. Saito
  • Journal Title: Geophys. J. Int. Volume: 178 Pages: 950-961
• [Journal Article] Distorion of the apparent radiation pattern in the High-frequency wavefield : Tottori-ken Seibu, Japan, Earthquake of 2000 (2009)
  • Author(s): Takemura, S., 古村孝志, T.Saito
  • Journal Title: Geophyis.J.Int. 178 Pages: 950-961
  • Peer Reviewed
• [Journal Article] D cattering of linear long-wave tsunamis due to randomly fluctuating sea-bottom topography : coda excitation and scattering attenuation (2009)
  • Author(s): Saito, T., 古村孝志
  • Journal Title: Geophys.J.Int. 177 Pages: 958-965
  • Peer Reviewed
• [Journal Article] 地震波伝播と強震動の大規模並列FDMシミュレーション (2009)
  • Author(s): 古村孝志
  • Journal Title: スーパーコンピューティングニュース 11 Pages: 35-63
• [Journal Article] An integrated simulation of ground motion and tsunami for the 1944 Tonankai earthquake using high-performance super computers (2009)
  • Author(s): Furumura, T. and T. Saito
  • Journal Title: Journal of Disaster Research 7 Pages: 118-126
  • Peer Reviewed
• [Journal Article] Differences in Attenuation of Ground Motion Perpendicular to the Mexican Subduction Zone between Colima and Guerrero: An Explanation Based on Numerical Modeling (2009)
  • Author(s): Cruz-Jimenez, H., F.J. Chave z-Garcia and Furumura T.
  • Journal Title: Bull. Seism. Soc. Am. 99 Pages: 400-406
  • Peer Reviewed
• [Journal Article] 差分法による3次元不均質場での地震波伝播の大規模計算 (2009)
  • Author(s): 古村孝志
  • Journal Title: 地震 60(印刷中)
  • NAID: 10025364671
  • Peer Reviewed
• [Journal Article] Development of long-period ground motions from the Nankai Trough, Japan, earthquakes : Observations and computer simulation of the 1944 Tonankai(Mw8. 1) and the 2004 SE Off-Kii Peninsula(Mw7. 4) Earthquakes (2008)
  • Author(s): Furumura, T., Hayakawa, M. Nakamura, K. Koketsu and T. Baba
  • Journal Title: Pure Appl. Geophys. Volume: 165 Pages: 585-607
• [Presentation] Large-scale parallel simulation of strong ground motion using the Earth Simulator (2009)
  • Author(s): Furumura, T.
  • Organizer: 1999 Chi-Chi, Taiwan, Earthquake Symposium
  • Place of Presentation: Taiwan, China
  • Year and Date: 2009-05-05
• [Presentation] 中国・四国地域で見られるP波Energy Partitionの特徴 (2009)
  • Author(s): 武村俊介・古村孝志、齊藤竜彦
  • Organizer: 2009年日本地球惑星科学連合大会講演予稿
• [Presentation] Large-scale Parallel 3D FDM Simulation of Seismic Wave Propagation Using High-performance Computers (2008)
  • Author(s): FuruMura, T. and T. Saito
  • Organizer: Second international symposium for "Integrated Predictive Simulation System for Earthquake and Tsunaii Disaster"
  • Place of Presentation: Tokyo
  • Year and Date: 2008-10-21