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Improving the detection of seismic velocity changes by seismic interferometry and physical interpretations on the changes

Research Project

Project/Area Number 24540449
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Solid earth and planetary physics
Research InstitutionTohoku University

Principal Investigator

NAKAHARA Hisashi  東北大学, 理学(系)研究科(研究院), 准教授 (20302078)

Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords地震波速度変化 / 地震波干渉法 / 物理的解釈 / 年周変化 / 地震波減衰 / 地震 / スロースリップ
Outline of Final Research Achievements

We have applied a method to use cross correlations of noise records at two stations, auto correlations at single station, cross-correlations between different components at single station for stably detecting seismic velocity changes in Japan by seismic interferometry. Seismic velocity changes detected have been decomposed into coseismic changes and the following post-seismic exponential decays associated with the 2008 Iwate-Miyagi Nairiku earthquake and the 2011 off the Pacific Coast of Tohoku earthquake (Tohoku-Oki ) earthquake, and seasonal variations. Coseismic and post-seismic changes are attributed to damages and their recovery at shallow depths due to strong-ground motion. Seasonal variations may have some relation to changes in the ground-water level.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (14 results)

All 2015 2014 2013 2012 Other

All Journal Article (5 results) (of which Peer Reviewed: 3 results) Presentation (9 results)

  • [Journal Article] Point spread functions for earthquake source imaging: An interpretation based on seismic interferometry2015

    • Author(s)
      Nakahara, H. and M. Haney
    • Journal Title

      Geophysical Journal International

      Volume: 202 Issue: 1 Pages: 54-61

    • DOI

      10.1093/gji/ggv109

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Auto correlation analysis of coda waves from local earthquakes for detecting temporal changes in shallow subsurface structures : the 2011 Tohoku-Oki, Japan earthquake2014

    • Author(s)
      Nakahara, H
    • Journal Title

      Pure Appl. Geophys

      Volume: 172 Issue: 2 Pages: 213-224

    • DOI

      10.1007/s00024-014-0849-0

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Single-station cross-correlation analysis of ambient seismic noise: Application to stations in the surroundings of the 2008 Iwate-Miyagi Nairiku earthquake2014

    • Author(s)
      Hobiger, M., U. Wegler, K. Shiomi, and H. Nakahara,
    • Journal Title

      Geophysical Journal International

      Volume: 198 Issue: 1 Pages: 90-109

    • DOI

      10.1093/gji/ggu115

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical Background for Estimating Attenuation Structures with Seismic Interferometry2013

    • Author(s)
      中原 恒
    • Journal Title

      Zisin (Journal of the Seismological Society of Japan. 2nd ser.)

      Volume: 65 Issue: 3 Pages: 243-249

    • DOI

      10.4294/zisin.65.243

    • NAID

      130004562104

    • ISSN
      0037-1114, 1883-9029, 2186-599X
    • Related Report
      2012 Research-status Report
  • [Journal Article] Formulation of the spatial auto-correlation (SPAC) method in dissipative media2012

    • Author(s)
      Nakahara H.
    • Journal Title

      Geophysical Journal International

      Volume: 190 Issue: 3 Pages: 1777-1783

    • DOI

      10.1111/j.1365-246x.2012.05591.x

    • Related Report
      2012 Research-status Report
  • [Presentation] 地震波速度のスペクトル解析2014

    • Author(s)
      中原 恒
    • Organizer
      日本地震学会2014年度秋季大会
    • Place of Presentation
      朱鷺メッセ(新潟県新潟市)
    • Year and Date
      2014-11-25
    • Related Report
      2014 Annual Research Report
  • [Presentation] 震源イメージングに対する点広がり関数2014

    • Author(s)
      中原 恒,Haney Matthew
    • Organizer
      日本地球惑星科学連合2014年大会
    • Place of Presentation
      パシフィコ横浜(神奈川県横浜市)
    • Year and Date
      2014-04-29
    • Related Report
      2014 Annual Research Report
  • [Presentation] コーダ波の自己相関解析による浅部地下構造の時間変化の検出2012

    • Author(s)
      中原 恒
    • Organizer
      日本地球惑星科学連合2012年大会
    • Place of Presentation
      幕張メッセ(千葉)
    • Related Report
      2012 Research-status Report
  • [Presentation] Formulation of the SPAC method in a dissipative medium2012

    • Author(s)
      Nakahara, H.
    • Organizer
      ヨーロッパ地震学会
    • Place of Presentation
      ロシア科学アカデミーモスクワ本部(ロシア)
    • Related Report
      2012 Research-status Report
  • [Presentation] コーダ波の自己相関解析による浅部地下構造の時間変化の検出 K-NETデータへの適用2012

    • Author(s)
      中原 恒
    • Organizer
      日本地震学会2012年度秋季大会
    • Place of Presentation
      函館市民体育館(北海道)
    • Related Report
      2012 Research-status Report
  • [Presentation] 減衰性媒質におけるSPAC法の定式化2012

    • Author(s)
      中原 恒
    • Organizer
      日本地震学会2012年度秋季大会
    • Place of Presentation
      函館市民体育館(北海道)
    • Related Report
      2012 Research-status Report
  • [Presentation] 地震波干渉法により減衰構造を求めるための理論的背景

    • Author(s)
      中原恒
    • Organizer
      日本地球惑星科学連合2013年大会
    • Place of Presentation
      幕張メッセ(千葉県)
    • Related Report
      2013 Research-status Report
  • [Presentation] 2次元減衰性媒質における非一様なノイズ分布に対する地震波干渉法の具体的表現

    • Author(s)
      中原恒
    • Organizer
      日本地震学会2013年度秋季大会
    • Place of Presentation
      神奈川県民ホール(横浜)
    • Related Report
      2013 Research-status Report
  • [Presentation] Auto correlation analysis of coda waves from local earthquakes for detecting temporal changes in shallow subsurface structures - The 2011 Tohoku-Oki, Japan, earthquake -

    • Author(s)
      Nakahara, H.
    • Organizer
      アメリカ地球物理学連合秋季大会
    • Place of Presentation
      モスコーンセンター(アメリカ)
    • Related Report
      2013 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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