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Authors: Barberi, G.* 
Cocina, O.* 
Maiolino, V.* 
Musumeci, C.* 
Privitera, E.* 
Title: Insight into Mt. Etna (Italy) kinematics during the 2002–2003 eruption as inferred from seismic stress and strain tensors
Issue Date: 13-Nov-2004
Series/Report no.: 21/31(2004)
DOI: 10.1029/2004GL020918
Keywords: Seismology: Seismicity and seismotectonics
Seismology: Volcano seismology
Volcanology: Eruption mechanisms
Volcanology: Magma migration
Subject Classification04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
Abstract: Seismic activity linked to the 2002–03 Mt. Etna eruption was investigated by analyzing the Md > 2.3 earthquakes. The results of 3D relocation were used to compute fault plane solutions and a selected dataset was inverted to determine stress and strain tensors. The analysis revealed a complex kinematic response of the eastern flank dominated by fast stress propagation and reorientation. We hypothesize that a vertical dike intruded the southern flank, generating an extensional regime that triggered a radial intrusion in the northeast sector of the volcano. The combined effects gave rise to a rotation of the stress tensor that controlled the activation of the Pernicana fault system. The volcanic and tectonic interactions produced a second reorientation of the stress tensor, causing a structural response in the southeast lower flank. The overall result of the deformation processes observed during the eruption was an E-W extension on the eastern flank of the volcano.
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