Estimating plume heights of explosive eruptions using high-frequency seismic amplitudes

Seismic signals during explosive eruptions have been correlated to eruption size or eruption volume flux for individual eruptive episodes. However, the universality of these correlations has yet to be confirmed. We quantified the sources of high-frequency seismic signals associated with sub-Plinian...

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Bibliographic Details
Published in:Geophysical journal international 2019-11, Vol.219 (2), p.1365-1376
Main Authors: Mori, Azusa, Kumagai, Hiroyuki
Format: Article
Language:English
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Summary:Seismic signals during explosive eruptions have been correlated to eruption size or eruption volume flux for individual eruptive episodes. However, the universality of these correlations has yet to be confirmed. We quantified the sources of high-frequency seismic signals associated with sub-Plinian and Vulcanian eruptions at Kirishima (Japan), Tungurahua (Ecuador) and other volcanoes in Japan using a simple approach based on highly scattered seismic waveform characteristics. We found that eruption plume heights scale to seismic source amplitudes and are described by two relations depending on the value of source amplitudes: power-law and exponential relations for plume height >6 km and 
ISSN:0956-540X
1365-246X
DOI:10.1093/gji/ggz374