Volcanic Micro-Earthquakes and Micro-Tremors at Mt. Aso (I)

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  • KIKUCHI Shigetomo
    Volcanological Laboratory, Faculty of Science, Kyoto University
  • SAKO Mikio
    Volcanological Laboratory, Faculty of Science, Kyoto University

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  • 阿蘇山の火山性微小地震と微動について (I)
  • 阿蘇山の火山性微小地震と微動について-1-
  • アソサン ノ カザンセイ ビショウ ジシン ト ビドウ ニ ツイテ 1

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Small pick-ups were set at the borehole which is about 30 m in depth, and volcanic micro-earthquakes were observed. It was found that long period volcanic micro-tremors (1st and 2nd kind micro-tremor) were also originated from micro-earthquakes. Consequently, the observation of 2nd kind micro-tremors was carried out in a region wide enough to investigate the mechanism of micro-earthquakes. It is likely that micro-tremors of the 2nd kind occur in phase around the epicentre.

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