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Source location and slip distribution of the subduction zone earthquakes

Research Project

Project/Area Number 18540418
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Solid earth and planetary physics
Research InstitutionTokyo Institute of Technology

Principal Investigator

OKAMOTO Taro  Tokyo Institute of Technology, 大学院・理工学研究科, 助教 (40270920)

Co-Investigator(Kenkyū-buntansha) TAKENAKA Hiroshi  九州大学, 理学研究院, 准教授 (30253397)
Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2007: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2006: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywords沈み込み帯 / 地震 / 津波 / 地球・惑星内部構造 / 震源過程 / 地震波理論 / 固体地球物理学 / ジャワ海溝 / スマトラ海溝 / 差分法 / 津波地震
Research Abstract

沈み込み帯の地震からの遠地実体波波形には震源付近の不均質構造に起因する強い後続波が現れるため、地震の詳細な解析が困難になる場合がある。本研究では不均質構造のもとでの波動計算を非常に効率良く実行できる独自の手法によって理論波形を計算し、小規模地震の地震発生場所・発震機構解を推定する手法と、大規模地震の断層すべり分布を決定する手法とを開発した。これらの手法を2006年ジャワ津波地震と2007年南スマトラ地震とに適用して、震源域の不均質構造と地震発生場所や断層すべり分布との関係を詳しく考察した

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (20 results)

All 2009 2008 2007 2006

All Journal Article (4 results) (of which Peer Reviewed: 2 results) Presentation (16 results)

  • [Journal Article] Effect of near-source trench structure on teleseismic body waveforms : an application of a 2.5D FDM to the Java trench, in Advances in Geosciences2009

    • Author(s)
      T. Okamoto and H. Takenaka
    • Journal Title

      edited by Kenji Satake,World Scientific Publishing Company, Singapore vol.13(in press)

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Waveform inversion for slip distribution of the 2006 Java tsunami earthquake by using 2.5D finite-difference Green's function2009

    • Author(s)
      Taro Okamoto and Hiroshi Takenaka
    • Journal Title

      Earth Planets and Space 61

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] 震源を探る-地震の震源解析について-2009

    • Author(s)
      岡元太郎
    • Journal Title

      玉川大学工学部紀要 第44号

      Pages: 23-34

    • NAID

      40016755065

    • Related Report
      2008 Final Research Report
  • [Journal Article] 震源を探る-地震の震源解析について-2009

    • Author(s)
      岡元太郎
    • Journal Title

      玉川大学工学部紀要 44

      Pages: 23-34

    • NAID

      40016755065

    • Related Report
      2008 Annual Research Report
  • [Presentation] Teleseismic Body Waveform Analysis of The 2007 Southern Sumatra Earthquakes With a2008

    • Author(s)
      Taro Okamoto & Hiroshi Takenaka
    • Organizer
      The 7th General Assembly of Asian Seismological Commision and The 2008 Fall Meeting of Seismological Society of Japan
    • Place of Presentation
      sukuba International Congress Center (Tsukuba)
    • Year and Date
      2008-11-25
    • Related Report
      2008 Final Research Report
  • [Presentation] Teleseismic Body Waveform Analysis of The 2007 Southern Sumatra Earthquakes With a 2.5 D FDM (2)2008

    • Author(s)
      Taro Okamoto & Hiroshi Takenaka
    • Organizer
      7th General Assembly of Asian Seismological Commission and Seismological Society of Japan, 2008 Fall meeting
    • Place of Presentation
      つくば国際会議場(エポカルつくば)
    • Year and Date
      2008-11-25
    • Related Report
      2008 Annual Research Report
  • [Presentation] Resolution Analysis of Teleseismic Waveform Inversion of Rupture Process of Tsunami Earthquake Using 1D and 2.5D Green's Functions2008

    • Author(s)
      Taro Okamoto and Hiroshi Takenaka
    • Organizer
      日本地球惑星科学連合2008 年大会
    • Place of Presentation
      幕張メッセ国際会議場(千葉市)
    • Year and Date
      2008-05-30
    • Related Report
      2008 Final Research Report
  • [Presentation] Resolution Analysis of Teleseismic Waveform Inversion of Rupture Process of Tsunami Earthquake Using 1D and 2.5D Green's Functions2008

    • Author(s)
      Taro Okamoto & Hiroshi Takenaka
    • Organizer
      日本地球惑星科学連合2008年大会
    • Place of Presentation
      千葉 幕張メッセ国際会議場
    • Year and Date
      2008-05-30
    • Related Report
      2008 Annual Research Report
  • [Presentation] Teleseismic Body Waveform Analysis of The 2007 Southern Sumatra Earthquake With a 2.5D Finite-Difference Method2008

    • Author(s)
      Taro Okamoto and Hiroshi Takenaka
    • Organizer
      日本地球惑星科学連合2008 年大会
    • Place of Presentation
      幕張メッセ国際会議場(千葉市)
    • Year and Date
      2008-05-29
    • Related Report
      2008 Final Research Report
  • [Presentation] Teleseismic Body Waveform Analysis of The 2007 Southern Sumatra Earthquakes With a 2.5D Finite-Difference Method2008

    • Author(s)
      Taro Okamoto & Hiroshi Takenaka
    • Organizer
      日本地球惑星科学連合2008年大会
    • Place of Presentation
      千葉 幕張メッセ国際会議場
    • Year and Date
      2008-05-29
    • Related Report
      2008 Annual Research Report
  • [Presentation] Resolution Analysis of Teleseismic Waveform Inversion of Rupture Process of Tsunami Earthquake Using 1D and 2.5D Green's Functions2007

    • Author(s)
      Taro Okamoto
    • Organizer
      American Geophysical Union 2007 Fall Meeting
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2007-12-14
    • Related Report
      2007 Annual Research Report
  • [Presentation] Effect of The Heterogeneous Structure Near The Source on The Teleseismic Body Waveforms From The Sunda Trench Earthquakes Analyzed by a 2.5D Finite-Difference Method2007

    • Author(s)
      Taro Okamoto
    • Organizer
      American Geophysical Union 2007 Fall Meeting
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2007-12-14
    • Related Report
      2007 Annual Research Report
  • [Presentation] Source Process of The July 17, 2006 Off Java Island Earthquake Analyzed by 2.5D FDM Computations2007

    • Author(s)
      Taro Okamoto
    • Organizer
      Asia Oceania Geosciences Society 2007 Meeting
    • Place of Presentation
      Bangkok, Thailand
    • Year and Date
      2007-08-04
    • Related Report
      2007 Annual Research Report
  • [Presentation] Source Process of The July 17, 2006 Off Java Island Earthquake by Using a 2.5D FDM Computations (2)2007

    • Author(s)
      岡元太郎
    • Organizer
      日本地球惑星科学連合2007年大会
    • Place of Presentation
      千葉県千葉市
    • Year and Date
      2007-05-22
    • Related Report
      2007 Annual Research Report
  • [Presentation] Effect of The Heterogeneous Structure Near The Source on The Teleseismic Body Waveforms From The Sunda Trench Earthquakes Analyzed by a 2.5D Finite-Difference Method,2007

    • Author(s)
      Okamoto, T., and Takenaka, H.
    • Organizer
      American Geophysical Union, 2007 Fall Meeting, December 14, 2007
    • Place of Presentation
      The Moscone Center, San Francisco, U.S.A
    • Related Report
      2008 Final Research Report
  • [Presentation] Resolution Analysis of Teleseismic Waveform Inversion of Rupture Process of Tsunami Earthquake Using 1D and 2.5D Green's Functions2007

    • Author(s)
      Okamoto, T., and Takenaka, H
    • Organizer
      American Geophysical Union, 2007 Fall Meeting, December 14, 2007
    • Place of Presentation
      The MosconeCenter, San Francisco, U.S.A
    • Related Report
      2008 Final Research Report
  • [Presentation] Source Process of The July 17, 2006 Off Java Island Earthquake Analyzed by 2.5D FDM Computations2007

    • Author(s)
      Taro Okamoto and Hiroshi Takenaka
    • Organizer
      Asia Oceania Geosciences Society 4th Annual Meeting, August 4, 2007
    • Place of Presentation
      Queen Sirikit National Convention Centre, Bangkok, Thailand
    • Related Report
      2008 Final Research Report
  • [Presentation] Source Process of The July 17, 2006 Off Java Island Earthquake by Using a 2.5D FDM Computations(2)2007

    • Author(s)
      Taro Okamoto and Hiroshi Takenaka
    • Organizer
      日本地球惑星科学連合2007年大会
    • Place of Presentation
      幕張メッセ国際会議場(千葉市)
    • Related Report
      2008 Final Research Report
  • [Presentation] Source Process of The July 17, 2006 Java Earthquake by Using a Fine Crustal Structure Model of The Java Trench And a 2.5D FDM Computations2006

    • Author(s)
      Okamoto, T., and Takenaka, H.
    • Organizer
      American Geophysical Union, 2006 Fall Meeting
    • Place of Presentation
      The Moscone Center, SanFrancisco, U.S.A
    • Year and Date
      2006-12-06
    • Related Report
      2008 Final Research Report
  • [Presentation] ジャワ海溝の微細地殻構造モデルと2.5次元差分法を用いた2006 年7 月17 日ジャワ島沖地震の震源過程解析2006

    • Author(s)
      岡元太郎・竹中博士
    • Organizer
      日本地震学会2006 年度秋季大会
    • Place of Presentation
      名古屋国際会議場(名古屋市)
    • Year and Date
      2006-11-02
    • Related Report
      2008 Final Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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