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Authors: Acocella, V.*
Behncke, B.*
Neri, M.*
D'Amico, S.*
Title: Link between major flank slip and 2002–2003 eruption at Mt. Etna (Italy)
Other Titles: Flank slip and eruption at Etna
Title of journal: Geophysical Research Letters
Series/Report no.: 24/30 (2003)
Publisher: American Geophysical Union
Issue Date: 27-Dec-2003
DOI: 10.1029/2003GL018642
Keywords: volcano seismology
surface fracturing
flank slip
Abstract: The 2002–2003 Etna eruption is studied through earthquake distributions and surface fracturing. In September 2002, earthquake-induced surface rupture (sinistral offset 0.48 m) occurred along the E-W striking Pernicana Fault (PF), on the NE flank. In late October, a flank eruption accompanied further ( 0.77 m) surface rupturing, reaching a total sinistral offset of 1.25 m; the deformation then propagated for 18 km eastwards to the coastline (sinistral offset 0.03 m) and southwards, along the NW-SE striking Timpe (dextral offset 0.04 m) and, later, Trecastagni faults (dextral offset 0.035 m). Seismicity (<4 km bsl) on the E flank accompanied surface fracturing: fault plane solutions indicate an overall ESEWNWextension direction, consistent with ESE slip of the E flank also revealed by ground fractures. A three-stage model of flank slip is proposed: inception (September earthquake), climax (accelerated slip and eruption) and propagation (E and S migration of the deformation).
Appears in Collections:Papers Published / Papers in press
04.01.99. General or miscellaneous
04.01.02. Geological and geophysical evidences of deep processes
04.02.99. General or miscellaneous
04.04.99. General or miscellaneous
04.04.09. Structural geology
04.06.99. General or miscellaneous
04.06.01. Earthquake faults: properties and evolution
04.06.02. Earthquake interactions and probability
04.06.08. Volcano seismology
04.06.11. Seismic risk
04.07.99. General or miscellaneous
04.07.02. Geodynamics
04.07.05. Stress
04.07.07. Tectonics
04.08.99. General or miscellaneous
04.08.03. Magmas
04.08.05. Volcanic rocks
04.08.06. Volcano monitoring
04.08.08. Volcanic risk
05.02.03. Volcanic eruptions

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