Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/6059
AuthorsGiudicepietro, F.* 
D'Auria, L.* 
Martini, M.* 
Caputo, T.* 
Peluso, R.* 
De Cesare, W.* 
Orazi, M.* 
Scarpato, G.* 
TitleChanges in the VLP seismic source during the 2007 Stromboli eruption
Issue Date2009
Series/Report no./182 (2009)
DOI10.1016/j.jvolgeores.2008.11.008
URIhttp://hdl.handle.net/2122/6059
Keywordsstromboli
very-long-period events
seismic source mechanism
volcano seismology
Subject Classification04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
AbstractAim of this paper is to identify variations in Very-Long-Period (VLP) source associated with eruptive style changes at Stromboli volcano (Italy) and to retrieve information about the shallow plumbing system that sustains the eruptive activity. We have considered a dataset of 74493 VLP events recorded during the period from January through August 2007, when an effusive eruption occurred (February 27–April 2).We performed a polarization analysis of the entire dataset and divided the considered period into four sub-periods on the basis of polarization characteristics. We then located the events and selected a subset of these events by applying a location quality threshold. The high quality locations demonstrate that during the effusive eruption the VLP sources first moved downward and then moved southwestward. To retrieve information about the geometry of the structures where the source processes take place, we further consider a subset of events and estimate their source mechanisms by using a moment tensor source function (MTSF) inversion technique. Inversion of the waveforms of the VLP events that occurred on February 27 allows us to obtain information about the dynamics of different source centroids distributed along different portions of the shallow magmatic conduits. The structure defined by the locations and source mechanisms shows a greater complexity compared with previous studies and their time variations give an insight into the kinematics of the eruption.
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