Mapping of seismogenic source faults based on geologic structure

2012 Fiscal Year Final Research Report

• Project/Area Number: 22340147
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geology
• Research Institution: The University of Tokyo
• Principal Investigator: SATO Hiroshi 東京大学, 地震研究所, 教授 (00183385)
• Co-Investigator(Kenkyū-buntansha): TOYOSHIMA Stuyoshi 新潟大学, 自然科学系, 教授 (10227655) ; KUDO Takeshi 中部大学, 工学部, 教授 (80410645) ; KUDO Takeshi 中部大学, 工学部, 教授 (80410645) ; TSUTSUMI Hiroyuki 京都大学, 理学研究科, 准教授 (60284428) ; KOSHIYA Shin 岩手大学, 工学部, 准教授 (90205378) ; YAMAKITA Satoshi 宮崎大学, 文化教育学部, 准教授 (80210342) ; ISHIYAMA Tatsuya 東京大学, 地震研究所, 助教 (90356452) ; MATSUBARA Makoto 独立行政法人防災科学技術研究所, 地震研究部, 研究員 (00500753) ; TAKEDA Tetsuya 独立行政法人防災科学技術研究所, 地震研究部, 研究員 (80455253)
• Project Period (FY): 2010 – 2012
• Keywords: 震源断層 / 活断層 / 内陸地震 / 地殻構造

Research Abstract

Constructing models of seismogenic source faults are very significant for the estimation of seismic hazards and better understanding of crustal deformation. We constructed source fault models in Tohoku area, based on the data of tectonic geomorphology, geophysical data, such as gravity anomaly, seismic reflection profiles, hypocentral distribution, earthquake tomography, and geologic data including surface geology and bore hole data. Size and geometry of source faults are closely related to the tectonics during the back-arc rifting and opening.

Research Products

• [Journal Article] Active blind thrusts beneath the Tokyo metropolitan area: Seismic hazards and inversion tectonics (2013)
  • Author(s): Ishiyama, T., Sato, H., Kato, N., Nakayama, T., Abe, S.
  • Journal Title: Geophysical Research Letters
  • DOI: DOI:10.1002/grl.50487
  • Peer Reviewed
• [Journal Article] Stability of the regional stress field in central Japan during the late Quaternary inferred from the stress inversion ofthe active fault data (2012)
  • Author(s): Tsutsumi, H., Sato, K., and Yamaji, A.
  • Journal Title: Geophysical ResearchLetters Volume: 39 Pages: L23303
  • DOI: doi:10.1029/2012GL054094
  • Peer Reviewed
• [Journal Article] Precise aftershock distribution and crustal structure in and around the northernfocal area of the2008 Iwate-Miyagi Nairiku Earthquake (2011)
  • Author(s): Kurashimo, E., Sato, H
  • Journal Title: Earth Planets Space Volume: 63 Pages: 903-912
  • Peer Reviewed
• [Journal Article] 北部本州背弧域の地殻構造と震源断層 (2010)
  • Author(s): 佐藤比呂志・加藤直子
  • Journal Title: 地質学雑誌 Volume: 116 Pages: 592-601
  • Peer Reviewed
• [Presentation] 東北地方の震源断層モデル (2012)
  • Author(s): 佐藤比呂志,石山達也,今泉俊文,加藤直子,武田哲也,越谷信,堤浩之,豊島剛志,工藤健,山北聡
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張,幕張メッセ.
  • Year and Date: 2012-05-22