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http://hdl.handle.net/2122/4369
Authors: | Benson, P.* Vinciguerra, S.* Meredith, P.* Young, P.* |
Title: | Laboratory Simulation of Volcano Seismicity | Journal: | Science | Series/Report no.: | 5899/322 (2008) | Publisher: | AAAS | Issue Date: | 10-Oct-2008 | DOI: | 10.1126/science.1161927 | URL: | http://www.sciencemag.org/cgi/content/abstract/322/5899/249 | Keywords: | rock physics volcanoes seismology laboratory simulation natural hazards |
Subject Classification: | 04. 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. |
Appears in Collections: | Article published / in press |
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