Seismicity and Ground Deformation Associated with Fountain Lava at Sakurajima

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Other Title
  • 2017年8月桜島溶岩噴泉活動に伴う地震活動及び地盤変動

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Abstract

Continuous lava fountain and following intermittent explosions on August 22-23 is the significant eruptive phenomena of the Sakurajima volcano in 2017. Prior to the lava fountain, inflation of the volcano started from the end of July. Eruption with volcanic ash emission occurred from 11 to 20 in August. Following rapid inflation from 10h on August 22, lava fountain occurred from 22h on August 22 and continued to 10 h on the next day. Volcanic tremor and minor infrasound were detected, associated with the lava fountain. Deflation of the volcano was also detected during the fountain and the volume decrease of the pressure source amounted 1.9×105m3. The eruptive rate is significantly higher than eruptive activity with volcanic ash emission. The eruptivity change to intermittent explosions from 11h on August 23. The explosions were followed by "chugging event" with repetition of pulses of volcanic gas and fragment emission. Volcanic tremor and infrasound shows monotone.

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Details 詳細情報について

  • CRID
    1050564288162563328
  • NII Book ID
    AN00027784
  • ISSN
    0386412X
  • HANDLE
    2433/235848
  • Text Lang
    ja
  • Article Type
    departmental bulletin paper
  • Data Source
    • IRDB

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