Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4204
AuthorsMalagnini, L.* 
Mayeda, K.* 
TitleHigh-stress strike-slip faults in the Apennines: An example from the 2002 San Giuliano earthquakes (southern Italy)
Issue Date2008
Series/Report no./35 (2008)
DOI10.1029/2008GL034024
URIhttp://hdl.handle.net/2122/4204
KeywordsSource mechanics
Radiated Energy
Subject Classification04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics 
AbstractUnder the hypotheses that the high-frequency part of the seismic spectrum is controlled by source duration and by peak slip velocity, we applied a recent coda envelope methodology to obtain stable relative source estimates between selected mainshocks and their aftershocks. We computed stable mainshock/aftershock S-wave spectral ratios and used a simple source model in order to quantify the scaling of the seismic sources of the San Giuliano sequence (Southern Italy). From the analysis of the ratios obtained between the main shock of 10/31/2002, and 11 aftershocks, and of those computed between the other main event of the sequence, of 11/01/2002, and 10 aftershocks, we observe that the scaling relationships: holds, with . Despite the strong discrepancy between the moment magnitude and the high-frequency ground motion excited by the main shocks (ML was much lower than Mw), that would indicate low-stress drop sources, we compute anomalously high stress parameters for both events. By comparison, the same analysis was carried out on seismic data of the Hector Mine seismic sequence (the main event of October 16, 1999, , and six of its aftershocks). We found: , with .
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
gl034024 1..6.pdfArticle449.31 kBAdobe PDFView/Open    Request a copy
Show full item record

Page view(s)

52
checked on Apr 23, 2017

Download(s)

20
checked on Apr 23, 2017

Google ScholarTM

Check

Altmetric