Seismic Activity in the Hida Mountain Range after the 2011 off the Pacific Coast of Tohoku Earthquake

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Other Title
  • 東北地方太平洋沖地震後に活発化した飛騨山脈脊梁部の地震活動について

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Abstract

Seismic activity near the Yake-dake volcano in the Hida mountain range that took place immediate after the 2011 off the Pacific Coast of Tohoku Earthquake was investigated. It initiated about ten minutes after the mainshock of the Tohoku earthquake and lasted for about one month. At the beginning, two active swarms were observed. One is at the northern flank of the Yake-dake volcano and the other is located between Yake-dake and Mt. Norikura volcanoes. The latter activity decreased by March 20, and the former activity lasted until early April. It includes two M>4.5 earthquakes at about 3km north of the Yake-dake volcano. Focal mechanism solutions of these swarm earthquake show NW-SE compression stress field, which coincides with regional stress field indicated by previous studies. No temporal changes of focal mechanisms are shown during March and April, which probably indicates no magmatic activity related to the Yake-dake volcano took place in this time period.

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Details 詳細情報について

  • CRID
    1050845760672620032
  • NII Book ID
    AN00027784
  • ISSN
    0386412X
  • HANDLE
    2433/161866
  • Text Lang
    ja
  • Article Type
    departmental bulletin paper
  • Data Source
    • IRDB

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