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http://hdl.handle.net/2122/8477
Authors: | De Gori, P.* Lucente, F. P.* Lombardi, A. M.* Chiarabba, C.* Montuori, C.* |
Title: | Heterogeneities along the 2009 L’Aquila normal fault inferred by the b-value distribution | Journal: | Geophysical Research Letters | Series/Report no.: | /39 (2012) | Publisher: | American Geophysical Union | Issue Date: | 4-Aug-2012 | DOI: | 10.1029/2012GL052822 | Keywords: | L'Aquila earthquake, b-value, heterogeneities, seimicity parameters. | Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolution | Abstract: | In this study we map the distribution of the b-value of the Gutenberg-Richter law—as well as complementary seismicity parameters—along the fault responsible for the 2009 MW 6.1 L'Aquila earthquake. We perform the calculations for two independent aftershock sub-catalogs, before and after a stable magnitude of completeness is reached. We find a substantial spatial variability of the b-values, which range from 0.6 to 1.3 over the fault plane. The comparison between the spatial distribution of the b-values and the main-shock slip pattern shows that the largest slip occurs in normal-to-high b-values portion of the fault plane, while low b-value is observed close to the main-shock nucleation. No substantial differences are found in the b-value computed before and after the main-shock struck in the small region of the fault plane populated by foreshocks. |
Appears in Collections: | Article published / in press |
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Main_Paper.pdf | Main article | 5.75 MB | Adobe PDF | View/Open |
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