Seismicity preceding volcanic eruptions: New experimental insights

被引：62
作者：
Burlini, Luigi
Vinciguerra, Sergio
Di Toro, Giulio
De Natale, Giuseppe
Meredith, Philip
Burg, Jean-Pierre
机构：
[1] ETH, Inst Geol, CH-8092 Zurich, Switzerland
[2] Ist Nazl Geofis & Vulcanol, HPHT Lab, I-00143 Rome, Italy
[3] Univ Padua, Dipartimento Geol Paleontol & Geofis, I-35137 Padua, Italy
[4] CNR, Ist Geosci & Georisorse, Unita Operat Padova, Padua, Italy
[5] Osserv Vesuviano, Ist Nazl Geofis & Vulcanol, I-80124 Naples, Italy
[6] UCL, Dept Earth Sci, London WC1E 6BT, England
来源：
GEOLOGY | 2007年 / 35卷 / 02期
关键词：
rock physics; volcanic risk; volcanic tremor; acoustic emissions; melts; eruption precursor; volcanic hazard mitigation; seismic signals; seismicity;
D O I：
10.1130/G23195A.1
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
A variety of seismic signals representing different physical mechanisms precedes volcanic eruptions. The most meaningful signals are high- and low-frequency earthquakes and volcanic tremor that have tentatively been related to fracturing and magma transport in the volcanic edifice. We provide experimental support for this association by reproducing magma migration while recording seismic signals. Opening fractures emit high-frequency acoustic events, while the switch to low frequency and harmonic tremor accompanies the flow of the melt in the fractures. Discerning between these seismic signals in nature can significantly refine volcanic hazard evaluation.
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页码：183 / 186
页数：4
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