Finite fault inversion of DInSAR coseismic displacement of the 2009 L'Aquila earthquake (central Italy)

Details Finite fault inversion of DInSAR coseismic displacement of the 2009 L'Aquila earthquake (central Italy) Finite fault inversion of DInSAR coseismic displacement of the 2009 L'Aquila earthquake (central Italy)

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3615305a&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 15, CiteID L15305

Mathematics

Logic

33

Geochemistry: Composition Of The Moon, Geochemistry: Composition Of The Moon (0905), Geochemistry: Composition Of The Moon (1240)

Scientific paper

We define the geometric and kinematic characteristics of the fault activated during the Mw = 6.3, 6 April 2009 L'Aquila earthquake, from the modeling of Envisat and COSMO-SkyMed (the first ever X-band interferogram inverted for a coseismic dislocation study) DInSAR interferograms. Our best-fit solution for the main shock is represented by a normal fault ˜16 km long and ˜12 km wide, with a small right-lateral component, dipping 47°SW with a maximum slip of ˜90 cm. Although the seismic dislocation probably ended at 1 km depth, the updip projection of the fault plane corresponds to the northern segment of the mapped Paganica-S. Demetrio fault, where alignment of surface breaks was observed in the field. The absence of this fault in existing seismic source catalogues suggests that an improved approach, involving detailed surface and subsurface geological and geophysical investigations, is needed for a better assessment of the seismic hazard at the local scale.

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