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Laboratory simulation of volcano seismicity

Benson, PM; Vinciguerra, S; Meredith, PG; Young, RP; (2008) Laboratory simulation of volcano seismicity. SCIENCE , 322 (5899) 249 - 252. 10.1126/science.1161927.

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Abstract

The physical processes generating seismicity within volcanic edifices are highly complex and 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 with 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.

Type:Article
Title:Laboratory simulation of volcano seismicity
DOI:10.1126/science.1161927
Keywords:MAGMA ASCENT, ERUPTIONS, EARTHQUAKES, MONTSERRAT, CONDUITS, CALDERA, SIGNALS, ISLAND, SLIP
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Earth Sciences

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