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Development and validation of gigantic-earthquake simulator in New Zealand

Research Project

Project/Area Number 18KK0095
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 17:Earth and planetary science and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Ando Ryosuke  東京大学, 大学院理学系研究科(理学部), 准教授 (10455256)

Co-Investigator(Kenkyū-buntansha) Romanet Pierre  国立研究開発法人防災科学技術研究所, 地震津波防災研究部門, 特別研究員 (50829190)
井出 哲  東京大学, 大学院理学系研究科(理学部), 教授 (90292713)
Project Period (FY) 2018-10-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2018: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywordsニュージーランド / 活断層 / 動的破壊シミュレーション / 古地震 / カイコウラ地震 / 応力場 / UAV / 大規模並列計算 / 地震発生 / レオロジー / 3次元断層モデル / スロー地震 / マルボロ断層 / 高速領域分割法 / 微動 / モデル / 巨大地震 / シミュレーション / 動的破壊 / ドローン / 内陸地震 / 地震破壊 / 連動型地震 / 大規模計算 / 地震 / Kaikoura
Outline of Final Research Achievements

Developing realistic models is major keys to understand and forecast the generation processes of large earthquakes. It is important to validate the model ingredient such as fault geometries, states of stresses and rheological properties of faults by comparing with observations. This study tackled this problem by using the rich data associated with the 2016 M7.9 Kaikoura (NZ) earthquake, which ruptured multiple inland active fault segments over the distance of 200km. The simulation reproducing the 2016 event shows the possibility that the earthquake recurrence history played an important role causing the complex rupture pattern. Our observational analysis also clarifies the structure of the slow earthquake (tectonic tremor) distribution, which reflects the rheological fault property at the depth.

Academic Significance and Societal Importance of the Research Achievements

本課題では,地震発生シミュレーター構築の方法論を古地震発生履歴を含む形に拡張し,実観測データとの比較で詳細な検証を行うことができた.これは,より幅広い対象に対して,さらなるモデル構築と予測を行う方向性を切り開く成果といえる.また,共同研究相手で行っているニュージーランド全土を対象とした断層モデル構築のノウハウと具体的な手法を導入することができた.これより,今後日本国内でも3次元断層形状モデルを全土的に整備することも可能となり,本課題で構築した地震発生シミュレーションを実行することができるようになる.それは,強震動計算など,防災減災対策にも有用な応用研究の高度化を進めることにもなるであろう.

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (22 results)

All 2023 2021 2020 2019 2018 Other

All Int'l Joint Research (5 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (13 results) (of which Int'l Joint Research: 6 results) Remarks (1 results)

  • [Int'l Joint Research] カンタベリー大学/GNS Science(ニュージーランド)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] GNS Science/Canterbury University/Victoria University, Wellington(ニュージーランド)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] GNS Science/University of Canterbury/Victoria University of Wellington(ニュージーランド)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of Southern California(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Canterbury University/GNS Science/Victoria University(ニュージーランド)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Depth‐Dependent Slow Earthquakes Controlled by Temperature Dependence of Brittle‐Ductile Transitional Rheology2023

    • Author(s)
      Ando Ryosuke、Ujiie Kohtaro、Nishiyama Naoki、Mori Yasushi
    • Journal Title

      Geophysical Research Letters

      Volume: 50 Issue: 5

    • DOI

      10.1029/2022gl101388

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Curvature, a mechanical link between the geometrical complexities of a fault: application to bends, kinks and rough faults,2020

    • Author(s)
      Pierre Romanet, Daisuke,Sato, and Ryosuke Ando,
    • Journal Title

      Geophysical Journal International

      Volume: 223 Issue: 1 Pages: 212-232

    • DOI

      10.1093/gji/ggaa308

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Dynamic Rupture Simulation Reproduces Spontaneous Multifault Rupture and Arrest During the 2016 M w 7.9 Kaikoura Earthquake2018

    • Author(s)
      Ando Ryosuke、Kaneko Yoshihiro
    • Journal Title

      Geophysical Research Letters

      Volume: 45 Issue: 23 Pages: 0-0

    • DOI

      10.1029/2018gl080550

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Rupture Path of the 2016 Kaikoura, NZ, Earthquake Inferred from Dynamic Rupture Simulation2023

    • Author(s)
      Ryosuke Ando
    • Organizer
      ACES
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Tremor detections in New Zealand and their relationship with the 2016 Mw 7.8 Kaikoura earthquake2021

    • Author(s)
      Pierre Romanet, Florent Aden Antoniow, Ryosuke Ando, Stephen Bannister, Calum Chamberlain, Yoshihisa Iio, Satoshi Matsumoto, Tomomi Okada, Richard H. Sibson, Akiko Toh, Satoshi Ide
    • Organizer
      European Geoscience Union
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Tremor detections in New Zealand and their relationship with the 2016 Mw 7.8 Kaikoura earthquake2021

    • Author(s)
      Pierre Romanet, Florent Aden Antoniow, Ryosuke Ando, Stephen Bannister, Calum Chamberlain, Yoshihisa Iio, Satoshi Matsumoto, Tomomi Okada, Richard H. Sibson, Akiko Toh, Satoshi Ide
    • Organizer
      日本地球惑星科学連合
    • Related Report
      2021 Research-status Report
  • [Presentation] Why the Hope fault bypassed during the 2016 Kaikoura earthquake?2021

    • Author(s)
      安藤 亮輔, 金子 善宏, Andy Howell, Andy Nicol, Robert Langridge, Ian Hamling
    • Organizer
      日本地震学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Detection of tremors in the Marlborough region and its relationship with the 2016 Mw 7.9 Kaikoura (New Zealand) earthquake2021

    • Author(s)
      Pierre Romanet, Florent Aden-Antoniow, Ryosuke Ando, Stephen Bannister, Calum Chamberlain, Yoshihisa Iio, Satoshi Matsumoto, Tomomi Okada, Richard H. Sibson, Akiko Toh, and Satoshi Ide
    • Organizer
      European Geoscience Union
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] HOW 3-D FAULT GEOMETRY CONTROLS DYNAMIC EARTHQUAKE RUPTURES? VALIDATE PHYSICS-BASED MODELS WITH RECENT OBSERVATION2019

    • Author(s)
      R. Ando
    • Organizer
      Workshop "Numerical Modeling of Earthquake Motions: Waves and Ruptures"
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dynamic rupture simulation reproduces spontaneous multifault rupture and arrest during the 2016 Mw 7.9 Kaikoura earthquake2019

    • Author(s)
      R. Ando and Y. Kaneko
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Research-status Report
  • [Presentation] ボーリングコア解析と物理的断層モデルに基づく富士川河口断層帯入山瀬断層の位置と活動性推定2019

    • Author(s)
      並木 亮、安藤 亮輔、宍倉 正展
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 関東地震発生履歴解明のための房総半島離水低地の堆積構造調査2019

    • Author(s)
      小森 純希, 宍倉 正展, 安藤 亮輔
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Research-status Report
  • [Presentation] History of Megathrust Earthquakes Along the Sagami Trough, Central Japan2019

    • Author(s)
      Komori, J., Shishikura, M., Ando, R.,
    • Organizer
      AOGS 16th Annual Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 隆起海岸段丘地形の DEMクラスタリングによる自動検出と分類2019

    • Author(s)
      小森 純希 , 安藤 亮輔 , 宍倉 正展 ,
    • Organizer
      日本地震学会秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Automatic Detection and Classification of the Uplifted Marine Terrace by Clustering DEM Dataset2019

    • Author(s)
      Komori, J., Ando, R., Shishikura, M.,
    • Organizer
      AGU Fall Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 動的破壊シミュレーションにより再現された2016年M7.9カイコウラ(ニュージーランド)地震の破壊の連鎖と停止2019

    • Author(s)
      安藤亮輔, Yoshihiro Kaneko
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2018 Research-status Report
  • [Remarks] 安藤研究室

    • Related Report
      2019 Research-status Report

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Published: 2018-10-12   Modified: 2024-01-30  

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