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MULTIDISCIPLINARY RESEARCH ON FAULT ACTIVITY IN THE WESTERN PART OF THE NORTH ANATOLIAN FAULT ZONE

Research Project

Project/Area Number 62043026
Research Category

Grant-in-Aid for Overseas Scientific Research

Allocation TypeSingle-year Grants
Section調査総括
Research InstitutionTokyo Institute of Technology

Principal Investigator

HONKURA Yoshimori  Tokyo Institute of Technology,Associate Professor, 理学部, 助教授 (00114637)

Co-Investigator(Kenkyū-buntansha) SATAKE Kenji  Tokyo Institute of Technology,Research Assistant, 理学部, 技官 (20178685)
OHSHIMAN Naoto  Nihon University,Research Associate, 文理学部, 助手 (70185255)
IKEDA Yasutaka  University of Tokyo,Research Associate, 理学部, 助手 (70134442)
TSUKUDA Tameshige  University of Tokyo,Associate Professor, 地震研究所, 助教授 (20027288)
MIYAKOSHI Jun-ichiro  Tottori University,Professor, 教養部, 教授 (60032116)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1987: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsNorth Anatolian Fault Zone / Active Fault / Trenching / Seismic Activiry / Geomagnetic Total Intensity / Self-Potential / Radon / 地震予知
Research Abstract

There exists a saismic gap in the western part of the North Anatolian Fault Zone.This fault is separated into two branches in the seismic gap area.The northern branch is characterized by a wide,graben-like structure, while the southern branch shows an active fault of right-lateral strike-slip type.We call the southern branch the Iznik-Mekece fault.We established a local seimsmic observation network and made temporary observations found that seismic activiry is very low at the Iznik-Mekece fault.This is wuite contrary to high seismicity at the northern branch where intermittent earthquake swarms are also notable.The Iznik-Mekece fault may currently be at the stabe of seismic gap of the second kind.Trenching was made at the channel of the small ephemeral stream showing a right-step defiection of about forty meters.The layer below surface soil is composed of colluvium deposits which are underlain by thick mud-flow deposits.The upper colluvium layer has not suffered any disturbances, whereas the lower colluvium layer and the mud-flow layer were disturbed in association with faulting on the Iznik-Mekece fault.The spcimens taken from the umdisturbed layer show the date of about 200 years B.P., indicating that no significant faulting has taken place since 200 years B.P. One specimen specimen showing about 500 years B.P. was found near the bottom of the colluvium laver which suffered disturbances due to faulting.It is concluded that the latest large earthquake at this fault must have taken place 200-500 years B.P.For earthquake prediction studies,continuous monitoring of possible precursoy changes is important.We started continuous measurements of geomagnetic total intensiry and self-potential.Chemical components of groundwater and radon concentration in soil gas have also been measured routinely.

Report

(1 results)
  • 1987 Final Research Report Summary

Research Products

(12 results)

All Other

All Publications (12 results)

  • [Publications] 佃 為成: 地震学会講演予稿集. 2. 118 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 本蔵 義守: 地震学会講演予稿集. 1. 316 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 池田 安隆: 地震学会講演予稿集. 1. 317 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 池田 安隆: 地震学会講演予稿集. 2. 282 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 本蔵 義守: 地球電磁気・地球惑星圏学会講演予稿集. 81. 130 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 大志方 直人: 地球電磁気・地球惑星圏学会講演予稿集. 81. 131 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Yoshimori HONKURA: "MULTIDISCIPLINARY RESEARCH ON FAULT ACTIVITY IN THE WESTERN PART OF THE NORTH ANATOLIAN FAULT ZONE" 120 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T.Tsukuda: "Microseismic observation in the seismic gap in the western part of the north Anatolian Fault Zone" Programme and Abstracts,Seismological Society of Japan.2. 118 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y.Honkura: "Electric and magnetic anomalies and active fault structure in the western part of the North Anatolian Fault Zon" Programme and Abstracts,Seismological society of Japan. 1. 316 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y.Ikeda: "Trenching in the western part of the North Anatolian Fault Zone" Programme and Abstracts,Seismological Society of Japan. 2. 282 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] N.Ohshiman: "Observation of the geomagnetic total intensity at the Iznid-Mekece area in the North Anatolian Fault Zone" Programme and Abstracts,Society of Geomagnetism and Earth,Planetary and Space Sciences. 81. 131 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y.Honkura: MULTIDISCIPLINARY RESEARCH ON FAULT ACTIVITY IN THE WESTERN PART OF THE NORTH ANATOLIAN FAULT ZONE, 120 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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