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Source mechanism of very-long-period signals accompanying dome growth activity at Merapi volcano, Indonesia

Geophysical Research Letters
By: , and 

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Abstract

Very-long-period (VLP) pulses with period of 6-7s, displaying similar waveforms, were identified in 1998 from broadband seismographs around the summit crater. These pulses accompanied most of multiphase (MP) earthquakes, a type of long-period event locally defined at Merapi Volcano. Source mechanisms for several VLP pulses were examined by applying moment tensor inversion to the waveform data. Solutions were consistent with a crack striking ???70?? and dipping ???50?? SW, 100m under the active dome, suggest pressurized gas transport involving accumulation and sudden release of 10-60 m3 of gas in the crack over a 6s interval.
Publication type Article
Publication Subtype Journal Article
Title Source mechanism of very-long-period signals accompanying dome growth activity at Merapi volcano, Indonesia
Series title Geophysical Research Letters
Volume 29
Issue 23
Year Published 2002
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Geophysical Research Letters
First page 33
Last page 1
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