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Authors: Patanè, D.* 
Mattia, M.* 
Aloisi, M.* 
Title: Shallow intrusive processes during 2002–2004 and current volcanic activity on Mt. Etna
Issue Date: 17-Mar-2005
Series/Report no.: L06302/32(2005)
DOI: 10.1029/2004GL021773
Keywords: Volcanology: Magma migration and fragmentation
Seismology: Earthquake interaction, forecasting, and prediction
Seismology: Seismicity and tectonics
Volcanology: Volcano monitoring
Volcanology: Eruption mechanisms and flow emplacement
Subject Classification04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
04. Solid Earth::04.08. Volcanology::04.08.03. Magmas 
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
Abstract: The understanding of shallow intrusive processes during 2002–2004, as well as the causes of the volcano-tectonic seismicity, has been improved at Mt. Etna by comparing the inversion results from GPS data with accurate 3D hypocentral locations. Our findings indicate that short periods of deflation (about six months) were followed by recharging phases after the end of both the 2001 and 2002–2003 flank eruptions. During the last recharging phase (June 2003–August 2004), modeling results and seismic observations suggest a composite mechanism of re-injection of magma into the rift-zones (S and NE), similar to that leading to the 2002–2003 flank eruption, which could have triggered the summit eruption started on September 7, 2004.
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