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A study of a large earthquake in Taiwan collision zone

Research Project

Project/Area Number 12373001
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section海外学術
Research Field 固体地球物理学
Research InstitutionThe University of Tokyo

Principal Investigator

HIRATA Naoshi  Earthquake Research Institute, Professor, 地震研究所, 教授 (90156670)

Co-Investigator(Kenkyū-buntansha) IKEDA Yasutaka  Department of Earth and Planetary Science, Associate Professor, 大学院・理学系研究科, 助教授 (70134442)
SENO Tetsuzo  Earthquake Research Institute, Professor, 地震研究所, 教授 (10216567)
SATO Hiroshi  Earthquake Research Institute, Associate Professor, 地震研究所, 助教授 (00183385)
NAKAO Shizeru  Earthquake Research Institute, Research Associate, 地震研究所, 助手 (90237214)
SAKAI Shin'ichi  Earthquake Research Institute, Research Associate, 地震研究所, 助手 (00251455)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥26,940,000 (Direct Cost: ¥24,900,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2002: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2001: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2000: ¥18,100,000 (Direct Cost: ¥18,100,000)
KeywordsTaiwan Earthquake / Collision zone / Large earthquake
Research Abstract

(1) Earthquake observation : We deployed 60 3-component seismographs along a 150-km-long line in central part of Taiwan to observe natural earthquakes. We observed local, regional and teleseismic events. The data show large-scale deformation of the crust, which might be controlled by the collision tectonics in Taiwan. A highly active seismic activity was detected in central part of Taiwan even two year has passed since the 1999 Chi-Chi earthquake.
(2) GPS observation : We analyzed a single frequency GPS data to improve accuracy.
(3) Geomorphology : We conducted a filed survey, analysis of air-bone photos and 1 : 2,500 geologic maps to evaluate quantitatively the present-day tectonic processes that are acting in the Taiwan. We found an active fold that runs parallel to the Chelungpu fault.
(4) Control source seismology : We conducted a 15-km-long reflection survey in central part of Taiwan. We detonated two 50-kg dynamite shot. We imaged a deep crust and a deeper extension of the Chelungpu fault.
(5) Geological survey : From the northern borehole of the Chelungpu fault, thin layers of very soft fault clay were found, while pseudotachylyte was found form the southern borehole. The degree of melting of the southern layer is very low, suggesting that high viscosity of the melt is likely to have restrained the smooth slip.
(6) Tectonics : The reason why there is a difference in the interplate seismic activity in collision zones are studied from a viewpoint dehydration from the subducted slab.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] Ikeda, Y.: "Geologic background for evaluating surface-faulting hazards"Structural Eng./Earthquake Eng., JSCE. 19. 143-147 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirata, N., H.Sato, S.Sakai, 他5名: "Aftershock distribution of the 1999 Chi-Chi, Taiwan, Earthquake and crustal structure in the source region"Proceedings of ICDP workshop on Drilling the Chenglungpu Fault. 17-18 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nagai, S., S.Sakai, N.Hirata: "Aftershock distribution of the 1999 Chi-Chi, Taiwan, Earthquake by the temporary seismic observation"Geophys.Res.Letters. (In press). 2003 GL017466 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nakao, S., C.-C.Liu, Y.Hirata, S.-B.Yu, N.Hirata: "Observations of postseismic crustal deformation following the 1999 Chi-Chi Taiwan Earthquake using a dense GPS array"Bull.Earthq.Res.Inst, U.Tokyo. 75. 47-56 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Sato, H., N.Hirata, T.Iwasaki, M.Matsubara, T.Ikawa: "Deep Seismic Reflection Profiling across the Ou Backbone Range, Northern Honshu Island, Japan"Tectonophysics. 355. 41-52 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Seno, T.: "Tsunami earthquakes as transient phenomena"Geophys.Res.Letters. 29(10). 10.1029/2002 GL014868 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 平田直: "地震はどこで発生するか、菊地正幸編「地殻ダイナミクスと地震発生」,東京大学地震研究所編集「地球科学の新展開2」12-27"朝倉書店. 222 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirata, N.: "Aftershock Observation of the 1999 Chi-Chi, Taiwan Earthquake"Bull. Earthq. Res. Inst. Univ.Tokyo. 57. 33-46 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirata, N.: "Aftershock distribution of the 1999 Chi-Chi, Taiwan, Earthquake and crustal structure in the source region"Proceedings of ICDP workshop on Drilling the Chelungpu Fault. 17-18 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ikeda, Y.: "Geologic background for evaluating surface-faulting hazards"Structural Eng./Earthquake Eng., JSCE. 19. 143-147 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nagai, S.: "Aftershock distribution of the 1999 Chi-Chi, Taiwan, Earthquake by the temporary seismic observation"Geophys. Res. Letters. 2003GL017466. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nakao, S.: "Observations of postseismic crustal deformation following the 1999 Chi-Chi, Taiwan Earthquake using a dense GPS array"Bull. Earthq. Res. Inst, U. Tokyo. 75. 47-56 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Sato, H.: "Deep Seismic Reflection Profiling across the Ou Backbone Range, Northern Honshu Island, Japan"Tectonophysics. 355. 41-52 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Seno, T.: "Tsunami earthquakes as transient phenomena"Geophys. Res. Letters. 20(10). 10.1029/2002 GL014868 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 蔵下英司, 徳永雅子, 平田直, 岩崎貴哉, 小平秀一, 金田義行, 伊藤潔, 西田良平, 木村昌三, 井川猛: "四国東部地域における地殻及び最上部マントルの地震波速度構造と沈み込むフィリピン海プレートの形状"地震2. 54・4. 489-505 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Nakanishi, A., N.Takahashi, J.0.Park, S.Miura, S.Kodaira, Y.Kaneda, N.Hirata, T.Iwasaki, M.Nakamura: "Crustal structure across the coseismic rupture zone of the 1944 Tonankai earthquake, the central Nankai trough seismogenic zone"Journal of Geophysical Research. 107,EPM2-1-21. (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Seno, T.: "Tsunami earthquakes as transient phenomena"Geophysical Research Letters. 29,10,10.1029/20. (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Kodaira, S., E.Kurashimo, J.0.Park, N.Takahashi, A.Nakanishi, S.Miura, T.Iwasaki, N.Hirata, K.Ito, Y.Kaneda: "Structural factors controlling a rupture process of a megathrust earthquake at the Nankai trough seismogenic zone"Geophys. J. Int.. 149. 815-835 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Iwasaki, T., T.Yoshii, T.Ito, H.Sato, N.Hirata: "Seismological features of island arc as inferred from recentseismic expeditions in Japan"Tectonophysics. 355. 53-66 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Sato, H., N.Hirata, T.Iwasaki, M.Matsubara, T.Ikawa: "Deep seismic reflection profiling across the Ou Backbone range, northern Honshu Island, Japan"Tectonophysics. 355・1-4. 41-52 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 平田直: "地震はどこで発生するか、菊地正幸編「地殻ダイナミクスと地震発生」,東京大学地震研究所編集「地球科学の新展開2」12-27"朝倉書店. 222 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 佐藤比呂志, 伊藤谷生, 池田安隆, 平田直, 今泉俊文, 井川猛: "震源断層-活断層システムのイメージングの意義と現状"地学雑誌. 110・6. 838-848 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 平田直: "内陸地震予知戦略"自然災害科学. 119・4. 409-412 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 0TSUKI, K, N.MONZAWA: "Contrasting fault rocks from two boreholes penetrating Chelung-pu Fault, Taiwan"ICDP Workshop on Drilling the Chelungpu Fault, Taiwan : Investigating the Physics of Faulting for a Recent Large Earthquake, held in Taiwan. (In press). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 瀬野徹三: "続プレートテクトニクスの基礎"朝倉書店. 169 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 佐藤比呂志,平田直: "内陸大規模地震の震源断層を探る"科学. 70. 58-65 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hirata,N.,S.Sakai,Z-S.Liaw,Y-B.Tsai,and S-B Yu: "Aftershock Observation of the 1999 Chi-Chi, Taiwan Earthquake"Bull.Earthq.Res.Inst.Univ.Tokyo. 75. 33-46 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nakao,S.,C-C.Liu,Y.Hirata,S-B Yu,and N.Hirata: "Observations of Postseismic Crustal deformation Following the 1999 Chi-Chi, Taiwan Earthquake Using a Dense GPS Array"Bull.Earthq.Res.Inst.Univ.Tokyo. 75. 47-56 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 佐藤比呂志: "陸域における活断層調査:活断層の形状を探る"地質と調査. 86. 2-8 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Sato,N.Hirata,Y.Ikeda and T.Iwasaki: "Geometry of active reverse faults in Northern Japan, International Workshop on Seismotectonics at the subduction zone"International Workshop on Seismotectonics at the subduction zone. 209-215 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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