期刊
GEOPHYSICAL RESEARCH LETTERS
卷 33, 期 9, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2006GL025928
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We infer temporal changes in the elastic properties of the edifice of Merapi volcano ( Java, Indonesia) before its eruption in 1998 by analyzing multiply scattered elastic waves excited by a repeatable controlled seismic source. A pre-eruptive increase of shear wave velocity, which correlates well with pre-eruptive seismicity and dome-growth is revealed. The method can be used as a pressure-gauge'' for pressure changes inside of volcanoes, because increasing pressures in rocks are known to cause proportionally increasing elastic wave velocities.
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