Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1357
AuthorsCapuano, P.* 
Coppa, U.* 
De Natale, G.* 
Di Sena, F.* 
Godano, C.* 
Troise, C.* 
TitleA detailed analysis of some local earthquakes at Somma-Vesuvius
Issue DateJun-1999
Series/Report no.42/3
URIhttp://hdl.handle.net/2122/1357
KeywordsSomma-Vesuvius
seismicity
focal mechanisms
spectral analysis
Subject Classification04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
AbstractIn this paper, we analyze local earthquakes which occurred at Somma-Vesuvius during two episodes of intense seismic swarms, in 1989 and 1995 respectively. For the selected earthquakes we have computed accurate hypocentral locations, focal mechanisms and spectral parameters. We have also studied the ground acceleration produced by the largest events of the sequences (ML 3.0), at various digital stations installed in the area during the periods of higher seismic activity. The main result is that seismicity during the two swarm episodes presents similar features in both locations and focal mechanisms. Strong site dependent effects are evidenced in the seismic radiation and strong amplifications in the frequency band 10-15 Hz are evident at stations located on the younger Vesuvius structure, with respect to one located on the ancient Somma structure. Furthermore, seismic stations show peak accelerations for the same events of more than one order of magnitude apart.
Appears in Collections:Annals of Geophysics

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