Evidence for seismogenic fracture of silicic magma

Hugh Tuffen (), Rosanna Smith and Peter R. Sammonds
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Hugh Tuffen: Lancaster University
Rosanna Smith: University College London, Gower Street, London WC1E 6BT, UK
Peter R. Sammonds: University College London, Gower Street, London WC1E 6BT, UK

Nature, 2008, vol. 453, issue 7194, 511-514

Abstract: Seismogenic magma: Breaking news Volcanoes typically undergo cycles of dome growth and collapse, and during dome growth many earthquakes occur within the volcano. The discovery of abundant brittle-to-ductile fault textures in silicic lavas, has led to the counterintuitive hypothesis that seismic events may be triggered by fracture and faulting within the erupting magma itself. Tuffen et al. now present experiments where they deform high-temperature silica-rich magmas under simulated volcanic conditions in order to test the hypothesis that high-temperature magma fracture is seismogenic. They find that acoustic emissions recorded during the experiments indicate that seismogenic rupture may occur in both crystal-rich and crystal-free silicic magmas at eruptive temperatures, extending the range of known conditions for seismogenic faulting.

Date: 2008
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DOI: 10.1038/nature06989

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