Seismic activity associated with the 2014 Shiraoi earthquake (MJMA 5.6) in middle east Iburi region, Hokkaido

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  • 2014年7月8日に発生した北海道白老町付近（胆振地方中東部）の地震（MJMA 5.6）について

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Abstract

A M5.6 shallow earthquake occurred on 8 July 2014 in middle east Iburi region, southwestern Hokkaido. Maximum seismic intensity of 5- was observed at Shiraoi town. Three temporal seismic stations had been installed in the focal region from 9 July 2014 to 30 April 2015. We determined 384 aftershock hypocenters by the double-difference tomographic hypocenter determination with proper seismic velocity structure. Relocated aftershocks were clearly distributed on a southeastern ward dipping plane with 5～10 km depth. This configuration agreed with a nodal plane of mainshock focal mechanism. Aftershocks occurred in surrounding part of a low seismicity patch. Mainshock was located deepest part of aftershock zone. These facts suggested that mainshock rupture propagated from deep to shallow, and a low seismicity patch was mainshock slip area. No clear correlation between this earthquake sequence and nearest active Tarumae volcano activity were identified.

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Details 詳細情報について

  • CRID
    1390853649725131904
  • NII Article ID
    120006410549
  • NII Book ID
    AN0008976X
  • DOI
    10.14943/gbhu.81.17
  • HANDLE
    2115/68475
  • ISSN
    04393503
  • Text Lang
    ja
  • Data Source
    • JaLC
    • IRDB
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Allowed

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