Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/6428

Authors: Gulia, L.*
Wiemer, S.*
Title: The influence of tectonic regimes on the earthquake size distribution: A case study for Italy
Title of journal: Geophysical Research Letters
Series/Report no.: /37 (2010)
Publisher: AGU
Issue Date: 21-May-2010
DOI: 10.1029/2010GL043066
Keywords: b-value
stress regime
Abstract: We explore the hypothesis that the relative size distribution of earthquakes, or b‐value, systematically depends on the style‐of‐faulting of seismotectonic zones. Because the b‐value has been shown to be inversely proportional to stress, we expect to find b(thrust) < b (strike‐slip) < b(normal). We test this expectation for the case of Italy. We first of all build a seismotectonic zonation model, consisting of 10 distinct tectonic zones. The faulting style of each zone is then characterized by the summed moment tensor of first‐motion and full‐waveform based focal mechanism. We calculate the b‐value for each zone: the lowest values are obtained for reverse zones (0.75– 0.81), highest for the normal (1.09), followed by the strikeslips (0.9–0.92). Our results suggest that b‐values, which are a critical parameter in all seismic hazard assessments, should be set according to the local faulting regimes. In addition, seismotectonic zonation models should take b‐value variations as one input.
Description: An edited version of this paper was published by AGU. Copyright (2010) American Geophysical Union
Appears in Collections:04.06.03. Earthquake source and dynamics
Papers Published / Papers in press

Files in This Item:

File Description SizeFormatVisibility
2010GL043066.pdfMain article673.61 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Share this record
Del.icio.us

Citeulike

Connotea

Facebook

Stumble it!

reddit


 

Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA