Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2224
AuthorsDi Grazia, G.* 
Falsaperla, S.* 
Langer, H.* 
TitleVolcanic tremor location during the 2004 Mount Etna lava effusion
Issue Date2006
Series/Report no./33 (2006)
DOI10.1029/2005GL025177
URIhttp://hdl.handle.net/2122/2224
KeywordsNONE
Subject Classification04. Solid Earth::04.02. Exploration geophysics::04.02.99. General or miscellaneous 
04. Solid Earth::04.04. Geology::04.04.09. Structural geology 
04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
AbstractA lava emission started at Mt. Etna, Italy, on 7 September, 2004. Neither earthquake seismicity heralded or accompanied the opening of the fracture field from which the lava poured out, nor volcanic tremor changed in amplitude and frequency content at the onset of the effusive activity. To highlight long-term changes, we propose a method for the location of the tremor source based on a 3D grid search, using the amplitude decay of the seismic signal, from January to November 2004. We find the centroid of the tremor source within a zone close to and partially overlapped with the summit craters (pre-effusive phase), which extended up to 2 km south of them (effusive phase). The depths are of between 1698 and 2387 m a.s.l. We hypothesize the lava effusion stemmed from a degassed magma body, although we find evidence of temporary magma overpressure conditions, such as those documented on 25 September.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
555.pdf1.22 MBAdobe PDFView/Open
Show full item record

Page view(s)

70
Last Week
0
Last month
0
checked on Jul 25, 2017

Download(s)

22
checked on Jul 25, 2017

Google ScholarTM

Check

Altmetric