Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2197
AuthorsPatanè, D.* 
Barberi, G.* 
Cocina, O.* 
De Gori, P.* 
Chiarabba, C.* 
TitleTime-resolved seismic tomography detects magma intrusions at Mt. Etna
Issue Date2006
Series/Report no./313 (2006)
DOI10.1126/science.1127724
URIhttp://hdl.handle.net/2122/2197
KeywordsNONE
Subject Classification04. Solid Earth::04.01. Earth Interior::04.01.02. Geological and geophysical evidences of deep processes 
04. Solid Earth::04.06. Seismology::04.06.07. Tomography and anisotropy 
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
AbstractThe continuous volcanic and seismic activity at Mount Etna makes this volcano an important laboratory for seismological and geophysical studies. We used repeated three-dimensional tomography to detect variations in elastic parameters during different volcanic cycles, before and during the October 2002–January 2003 flank eruption. Well-defined anomalous low P- to S-wave velocity ratio volumes were revealed. Absent during the pre-eruptive period, the anomalies trace the intrusion of volatile-rich (Q4 weight percent) basaltic magma, most of which rose up only a few months before the onset of eruption. The observed time changes of velocity anomalies suggest that four-dimensional tomography provides a basis for more efficient volcano monitoring and shortand midterm eruption forecasting of explosive activity.
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