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Authors: Benson, P.* 
Vinciguerra, S.* 
Meredith, P.* 
Young, P.* 
Title: Laboratory Simulation of Volcano Seismicity
Issue Date: 10-Oct-2008
Series/Report no.: 5899/322 (2008)
DOI: 10.1126/science.1161927
Keywords: rock physics
volcanoes seismology
laboratory simulation natural hazards
Subject Classification04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
Abstract: Physical processes generating seismicity within volcanic edifices are highly complex and remain not fully understood. We report results from a laboratory experiment in which basalt from Mount Etna volcano (Italy) was deformed and fractured. The experiment was monitored using an array of transducers around the sample to permit full-waveform capture, location and analysis of microseismic events. Rapid, post-failure decompression of the water-filled pore volume and damage zone triggered many low frequency events, analogous to volcanic long period seismicity. The low-frequencies were associated with pore fluid decompression and were located in the damage zone in the fractured sample; these events exhibited a weak component of shear (double-couple) slip, consistent with fluid-driven events occurring beneath active volcanoes.
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