Source parameters of the volcanic eruption earthquakes at Mount Tokachi, Hokkaido, Japan, and a magma ascending model

研究成果: Article査読

18 被引用数 (Scopus)

抄録

The source parameters of the eruption earthquakes observed at Mount Tokachi in 1989 are estimated on the basis of the single force model. By fitting the theoretical source spectra with the observed ones, the peak amplitude of force and the source duration were estimated to be 107-1010 N, and 0.5-0.8 s, respectively. To give a physical explanation of the empirical relations of source parameters, a magma ascending model is presented as a source of eruption earthquakes; a spherical batch of gas-rich magma vertically migrates from a deep-seated magma reservoir to the surface and is cooled by heat conduction. When the magma reaches the ground surface, it erupts and causes an eruption earthquake. Comparing the empirical relations derived from seismic analysis with the magma ascending model, it is concluded that the radius of an ascending batch of magma plays an important role in the generation of eruption earthquakes. -from Author

本文言語English
ページ(範囲)12,465-12,473
ジャーナルJournal of Geophysical Research
100
B7
出版ステータスPublished - 1995 1月 1

ASJC Scopus subject areas

  • 地球物理学
  • 林業
  • 海洋学
  • 水圏科学
  • 生態学
  • 水の科学と技術
  • 土壌科学
  • 地球化学および岩石学
  • 地表過程
  • 大気科学
  • 地球惑星科学(その他)
  • 宇宙惑星科学
  • 古生物学

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