Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1051
AuthorsAuger, D.* 
D’Auria, L.* 
Martini, M.* 
Chouet, B.* 
Dawson, P.* 
TitleReal-time inversion of VLP source functions at Stromboli Volcano, Italy.
Issue Date20-Mar-2006
URIhttp://hdl.handle.net/2122/1051
KeywordsVLP
Volcano
Subject Classification04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
05. General::05.01. Computational geophysics::05.01.03. Inverse methods 
AbstractWe present a comprehensive processing tool for the real-time analysis of the source mechanism of Very-Long-Period (VLP) seismic data based on waveform inversions performed in the frequency domain for a point source. A search for the source providing the best-fitting solution is conducted over a three-dimensional grid of assumed source locations, in which the Green’s functions associated with each point source are calculated by finite differences using the reciprocal relation between source and receiver. Tests performed on 62 nodes of a Linux cluster indicate that the waveform inversion and search for the best-fitting signal over 100,000 point sources require roughly 30 s of processing time for a 2-min-long record. The procedure is applied to post-processing of a data archive and to continuous automatic inversion of real-time data at Stromboli, providing insights into different modes of degassing at this volcano.
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