The 2009 L' Aquila Earthquake (Central Italy): a source mechanism and implications for seismic hazard

Walters, R. J. and Elliott, J. R. and D'Agostino, N. and England, P. C. and Hunstad, I. and Jackson, J. A. and Parsons, B. and Phillips, R. J. and Roberts, G. (2009) The 2009 L' Aquila Earthquake (Central Italy): a source mechanism and implications for seismic hazard. Geophysical Research Letters, 36. L17312. ISSN 0094–8276 DOI https://doi.org/10.1029/2009GL039337

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Abstract

We use InSAR and body-wave seismology to determine independent source parameters for the 6th April 2009 Mw 6.3 L'Aquila earthquake and con¯rm that the earthquake ruptured a SW-dipping normal fault with »0.6{0.8 m slip. The causative Paganica fault had been neglected relative to other nearby range-frontal faults, partly because it has a subdued geomorphological ex- pression in comparison with these faults. The L'Aquila earthquake occurred in an area with a marked seismic de¯cit relative to geodetically determined strain accumulation. We use our source model to calculate stress changes on nearby faults produced by the L'Aquila earthquake and we ¯nd that several of these faults have been brought closer to failure.

Item Type:	Article
Uncontrolled Keywords:	09AREP; IA58;
Subjects:	02 - Geodynamics, Geophysics and Tectonics
Divisions:	02 - Geodynamics, Geophysics and Tectonics 08 - Green Open Access
Journal or Publication Title:	Geophysical Research Letters
Volume:	36
Page Range:	L17312
Identification Number:	https://doi.org/10.1029/2009GL039337
Depositing User:	Sarah Humbert
Date Deposited:	13 Aug 2009 14:48
Last Modified:	22 Sep 2015 10:59
URI:	http://eprints.esc.cam.ac.uk/id/eprint/1127

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