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Migration of tremor locations before the 2008 eruption of Meakandake Volcano, Hokkaido, Japan

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Title: Migration of tremor locations before the 2008 eruption of Meakandake Volcano, Hokkaido, Japan
Authors: Ogiso, Masashi Browse this author
Yomogida, Kiyoshi Browse this author →KAKEN DB
Keywords: Tremor location
Phreatic eruption
Issue Date: 1-Mar-2012
Publisher: Elsevier
Journal Title: Journal of Volcanology and Geothermal Research
Volume: 217-218
Start Page: 8
End Page: 20
Publisher DOI: 10.1016/j.jvolgeores.2011.12.005
Abstract: We estimate the locations of three tremor sequences, denoted A, B, and C, that occurred before the 2008 eruption at Meakandake volcano, eastern Hokkaido, Japan, using the spatial distribution of seismic amplitudes of volcanic tremor. Although we used only five seismic stations, we could estimate the locations of three tremor sequences. We find two different tremor source areas: those of Tremor A located about 2 km southwest of the erupted crater (Area A) and the other about 1 km southeast to south of the crater as that of the Tremor C (Area B). The location of an early phase of the Tremor B is estimated in Area A while the location of its later phase appears to connect the two areas. This location migration during Tremor B occurred simultaneously with other important geophysical phenomena before the eruption event, as suggested by geodetic and geomagnetic studies. Our findings of the two tremor locations of the tremor sequences and location migration during Tremor Bmay be important for future monitoring activities at Meakandake volcano, particularly to forecast the location of a possible phreatic eruption.
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 蓬田 清

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