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Elucidating the deformation mechanism around and between active faults

Research Project

Project/Area Number 18K03795
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17040:Solid earth sciences-related
Research InstitutionTohoku University

Principal Investigator

Fukushima Yo  東北大学, 災害科学国際研究所, 准教授 (80432417)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2018: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
KeywordsInSAR / InSAR時系列解析 / 断層クリープ / 地震発生層 / 副次的断層 / 地震性断層すべり / 非地震性断層すべり / 航空機レーザー / SAR / 地表変位 / 地震 / 活断層 / 地殻変動 / 地殻レオロジー
Outline of Final Research Achievements

The two earthquakes in 2011 and 2016 in northern Ibaraki prefecture (M6) were found to have occurred along an identical fault. The postseismic deformation of the first earthquake was anomalously large, probably due to the effect of the 2011 M9 Tohoku-Oki earthquake. The Philippine fault in the Leyte Island was found to be composed of locked and unlocked (creeping) segments. The locked segment was remarkably identical to the rupture segment of the 2017 earthquake. In the area on the northern edge of the Futagawa fault, the main rupture fault of the 2016 Kumamoto earthquake, secondary-ruptured faults appeared. These ruptures were found to have been triggered by the main rupture.

Academic Significance and Societal Importance of the Research Achievements

茨城県北部の地震の解析からは、極短期間で同一活断層が再活動することを示し、断層破壊域周辺(「端」)が脆性破壊を起こさない流動変形域であることを示唆する結果を得た。フィリピン断層の研究からは、空間的に明瞭に連続する断層面上でも、地震破壊を起こすセグメントと起こさないセグメントが明確に棲み分けていることを示した。2016年熊本地震の解析からは、地震破壊域の「端」の一形態として火山域があり、そこではごく表層でしか脆性破壊を起こさないことを示した。総じて、断層(地震破壊可能な弱面)は地殻内ごく一部のみに存在し、それ以外の領域は地震を起こせない(流動変形または断層クリープ)ことを示唆する結果を得た。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (22 results)

All 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (14 results) (of which Int'l Joint Research: 7 results)

  • [Int'l Joint Research] パリ高等師範学校(フランス)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] パリ高等師範学校(フランス)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Determination of the dipping direction of a blind reverse fault from InSAR: case study on the 2017 Sefid Sang earthquake, northeastern Iran2020

    • Author(s)
      Nematollah Ghayournajarkar, Yo Fukushima
    • Journal Title

      Earth Planets and Space

      Volume: 72 Issue: 1 Pages: 64-64

    • DOI

      10.1186/s40623-020-01190-6

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characteristics of secondary-ruptured faults in the Aso Caldera triggered by the 2016 Mw 7.0 Kumamoto earthquake2020

    • Author(s)
      Fukushima Yo, Ishimura Daisuke
    • Journal Title

      Earth, Planets and Space

      Volume: 72 Issue: 1 Pages: 175-175

    • DOI

      10.1186/s40623-020-01306-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The relationship between seismic and aseismic slip on the Philippine Fault on Leyte Island:Bayesian modeling of fault slip and geothermal subsidence2020

    • Author(s)
      Dianala,J.D.B.,R.Jolivet,M.Y.Thomas,Y.Fukushima,B.Parsons,and R.Walker
    • Journal Title

      Journal of Geophysical Research

      Volume: 12 Issue: 12

    • DOI

      10.1029/2020jb020052

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Repeated triggered ruptures on a distributed secondary fault system: an example from the 2016 Kumamoto earthquake, southwest Japan.2020

    • Author(s)
      Daisuke Ishimura, Hiroyuki Tsutsumi, Shinji Toda, Yo Fukushima, Yasuhiro Kumahara, Naoya Takahashi, Toshihiko Ichihara & Keita Takada
    • Journal Title

      Earth Planets Space

      Volume: 73 Issue: 1 Pages: 39-39

    • DOI

      10.1186/s40623-021-01371-x

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Surface creep rate distribution along the Philippine fault, Leyte Island, and possible repeating of Mw~6.5 earthquakes on an isolated locked patch2019

    • Author(s)
      Fukushima, Y., M. Hashimoto, M. Miyazawa, N. Uchida, and T. Taira
    • Journal Title

      Earth Planets and Space

      Volume: 71 Issue: 1 Pages: 118-118

    • DOI

      10.1186/s40623-019-1096-5

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Extremely early recurrence of intraplate fault rupture following the Tohoku-Oki earthquake2018

    • Author(s)
      Yo Fukushima, Shinji Toda, Satoshi Miura, Daisuke Ishimura, Jun’ichi Fukuda, Tomotsugu Demachi, Kenji Tachibana
    • Journal Title

      Nature Geoscience

      Volume: 11 Issue: 10 Pages: 777-781

    • DOI

      10.1038/s41561-018-0201-x

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Ups and downs in Osaka metropolitan area,Japan,detected by LiCSBAS InSAR time-series analysis2020

    • Author(s)
      Yo Fukushima
    • Organizer
      日本地球惑星科学連合-アメリカ物理学連合合同2020年大会
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Determination of the dipping direction of a blind reverse fault from InSAR:Case study on 2017 Sefid Sang earthquake, Northeastern Iran2020

    • Author(s)
      Ghayournajarkar, N. and Y. Fukushima
    • Organizer
      日本地球惑星科学連合-アメリカ地球物理学連合合同2020年大会
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] InSAR data analysis to constrain source parameters of Iranian blind thrust earthquakes (M_w>=5.8)2020

    • Author(s)
      Ghayournajarkar, N. and Y. Fukushima
    • Organizer
      日本測地学会第134回講演会
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 2016年熊本地震の副次的断層すべりによるInSAR地表変位とすべり分布2019

    • Author(s)
      福島 洋、石村 大輔
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Complementary occurrence of fault creep and an Mw 6.5 earthquake along the Philippine Fault on Leyte Island revealed by ALOS and ALOS-2 SAR interferometry2019

    • Author(s)
      Yo Fukushima, Manabu Hashimoto
    • Organizer
      第39回地球科学・リモートセンシング国際シンポジウム 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] レイテ島におけるフィリピン断層のクリープ分布と孤立固着域でのMw~6.5の繰り返し地震の可能性2019

    • Author(s)
      福島 洋,橋本 学,宮澤理稔,内田直希,平 貴昭
    • Organizer
      日本測地学会第132回講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] レイテ島におけるフィリピン断層クリープ速度と孤立固着域におけるMw~6.5の地震の繰り返し発生の可能性2019

    • Author(s)
      福島 洋,橋本 学,宮澤理稔,内田直希,平 貴昭
    • Organizer
      日本地震学会2019年度秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Mw 6.5 Repeater Along a Creeping Section of the Philippine Fault?2019

    • Author(s)
      Yo Fukushima, Manabu Hashimoto, Masatoshi Miyazawa, Naoki Uchida, and Taka’aki Taira
    • Organizer
      American Geophysical Union Fall Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ALOS-2 observation of the 2017 Sefidsang earthquake, northeastern Iran: a blind shallow-dipping thrust event near the Eastern Kopeh Dagh2019

    • Author(s)
      Nematollah Ghayournajarkar, and Yo Fukushima
    • Organizer
      Japan Geosciences Union Meeting 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Joint analysis of the ALOS-2 and Sentinel-1A data on the 2017 Sefid Sang earthquake, Northeastern Iran2019

    • Author(s)
      Nematollah Ghayournajarkar, and Yo Fukushima
    • Organizer
      Geodetic Society of Japan 132nd Meeting
    • Related Report
      2019 Research-status Report
  • [Presentation] Extremely early recurrence of an M6 intraplate earthquake observed after the 2011 Tohoku-oki earthquake2018

    • Author(s)
      福島 洋、遠田晋次、三浦哲、石村大輔、太田雄策、出町知嗣、立花憲司
    • Organizer
      European Geosciences Union General Assembly 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spatial variation of creep rate of the Philippine fault on Leyte Island and its relation with the 6 July 2017 earthquake (Mw 6.5) revealed by SAR interferometry2018

    • Author(s)
      福島 洋・橋本 学
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Relation between the spatial variation of creep rate and the 2017 Mw 6.5 Ormoc earthquake along the Philippine fault on Leyte Island2018

    • Author(s)
      Yo Fukushima and Manabu Hashimoto
    • Organizer
      19th General Assembly of WEGENER
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 2016年熊本地震時に出現した阿蘇カルデラ内地表地震断層のInSAR解析2018

    • Author(s)
      福島 洋・石村大輔
    • Organizer
      日本測地学会第130回講演会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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