Seismic noise analysis at Kusatsu-Shirane volcano, Japan
Abstract
Kusatsu-Shirane volcano, situated in the central part of Japan, has repeated phreatic explosions at the interval of several decades till 1983. There remain seismic and fumarolic activities. The volcano has been monitored with several seismic stations including three borehole ones since 2001. The proximity of the stations to the seismic sources enables us to detect very small earthquakes (magnitude ~ -2). Not only event-triggered data, but also whole continuous data have been recorded for many years at a frequency of 100 Hz. Although seismic activity is basically unchanged through the observation period, new fumaroles were found around the main crater in 2008. Recent years, analysis based on correlation of seismic noise record are identified as a powerful method for estimating crustal structure, and for investigating its temporal change. In this study, I investigate temporal change of the crustal struture under Kusatsu-Shirane volcano through seismic noise analysis.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2010
- Bibcode:
- 2010AGUFM.S13B1992Y
- Keywords:
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- 7280 SEISMOLOGY / Volcano seismology;
- 8419 VOLCANOLOGY / Volcano monitoring