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Numerical modeling for seismic cycle of great interplate earthquakes along the Nankai trough following a friction law

Research Project

Project/Area Number 08454124
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体地球物理学
Research InstitutionNagoya University

Principal Investigator

HIRAHARA Kazuro  Graduate School of Science, Nagoya University, Professor, 大学院・理学研究科, 教授 (40165197)

Co-Investigator(Kenkyū-buntansha) SHIBUTANI Takurou  Disaster Prevention Research Institute, Kyoto Univ., Researcher, 防災研究所, 助手 (70187417)
KUMAGAI Hiroyuki  School of Science, Nagoya Univ., Researcher, 理学部, 助手 (00260589)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥7,300,000 (Direct Cost: ¥7,300,000)
Fiscal Year 1998: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1997: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1996: ¥4,800,000 (Direct Cost: ¥4,800,000)
KeywordsFriction law / Nankai trough / Great interplate earthquake / Seismic cycle / FEM / Numerical modeling / FEM
Research Abstract

The following researches were made for the numerical modeling of seismic cycle of great interplate earthquakes along the Nankai trough.
(1) We implemented a friction law in FEM modeling to simulate seismic cycle in a viscoelastic heterogeneous medium. We constructed 2-D viscoelastic FEM model where a plate is subducting beneath an island arc with a crust and a mantle wedge and assigned frictional parameters down to a depth of 70 km along the plate-interface.
(2) We simulated earthquake generation using a variety of friction laws based on block-spring model to compare the results with the observed statistics of earthquake occurrence.
(3) We constructed the 3-D Philippine Sea plate subducting along the Nankai trough beneath southwest Japan, using the distribution of subcrustal earthquakes for the seismic slab and a tomographic technique for the aseismic slab in the deeper portion.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 平原和朗: "日本列島地震発生サイクルシミュレーションシステム構築に向けて" 月刊地球. 20. 753-757 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 平原和朗: "摩擦構成則に基づく地震発生サイクルシミュレーション" 地震ジャーナル. 26. 1-10 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 平原和朗: "摩擦構成則を考慮したプレート間巨大地震発生システムの2次元有元要素法シミュレーション" 月刊地球. 号外24. 155-160 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 熊谷博之: "地震発生メカニズムと予測 7.地震の集団的性変とそのモデル化" 土と基礎. 46. 49-54 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kazuro Hirahara: "Simulation system of earthquake cycle in Japan Islands" Chikyu. 20. 753-757 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kazuro Hirahara: "Simulation of earthquake cycle based on a friction law" Zisin Journal. 26. 1-10 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kazuro Hirahara: "2-D FEM simulation of seismic cycle of great interplate earthquakes following a friction law" Chikyu. 24. 155-160 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroyuki Kumagai: "Earthquake statistics and its modeling" Solid and fundamental. 46. 49-54 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 平原和朗: "日本列島地震発生サイクルシミュレーションシステムの構築に向けて" 月刊地球. 20・12. 753-757 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 平原和朗: "摩擦構成則を考慮したプレート間巨大地震発生サイクルの2次元有限要素法シミュレーション-予備的解析-" 月刊地球. 号外24. 155-160 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 藤井直之・平原和朗: "地殻変動統合観測系によるプレート間カップリングの変動の解明" 月刊 地球. 20. 66-70 (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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