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AMPLITUDE ANOMALY OF SEISMIC P WAVES AROUND MT.NAKA-DAKE, VOLCANO ASO

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Kyoto University Research Information Repository
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  • 453.5
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Abstract

Amplitude anomaly of sesimic P waves was observed in the seismic observation networkaround Mt.Naka-dake, Volcano Aso. Maximum amplitudes of P waves were relativelysmall near the active crater of Mt.Naka-dake. Result of analysis taking account of raypaths suggested that P waves were attenuated in the crater area of diameter 1-2 km andat depth 1 or 2 km under the sea level. This region contains the focal zone of volcanicearthquakes.

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