The Seismic Reflectors Beneath Aira Caldera

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Bibliographic Information

Other Title
  • 姶良カルデラにおける地震波反射面の検出

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Abstract

Seismic reflectors at the depth of Aira Caldera are presented through seismic array analysis of the later arrivals in the controlled-source seismograms across northern Kagoshima Bay on November 2008. Though the first arrivals with a characteristic pattern have been analyzed, later arrivals have never been analyzed vigorously. Seismic array analysis of the seismograms resolves numerous PP and PS reflections from depth of Aira Caldera in the basis of arrival time, back azimuth and apparent velocity. It is revealed that reflector structure in the eastern part is more complicated than that in the western part down to 20 km depth and prominent PS conversion comes from 14 km depth in the west part of Aira Caldera. The result provides fundamental knowledge to consider activity of the caldera.

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Details 詳細情報について

  • CRID
    1050006210015540352
  • NII Article ID
    120006950379
  • NII Book ID
    AN00027784
  • ISSN
    0386412X
  • HANDLE
    2433/260814
  • Text Lang
    ja
  • Article Type
    departmental bulletin paper
  • Data Source
    • IRDB
    • CiNii Articles

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