Journal
TERRA NOVA
Volume 22, Issue 1, Pages 43-51Publisher
WILEY
DOI: 10.1111/j.1365-3121.2009.00915.x
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P>An earthquake of Mw = 6.3 struck L'Aquila town (central Italy) on 6 April 2009 rupturing an similar to 18-km-long SW-dipping normal fault. The aftershock area extended for a length of more than 35 km and included major aftershocks on 7 and 9 April and thousands of minor events. Surface faulting occurred along the SW-dipping Paganica fault with a continuous extent of similar to 2.5 km. Ruptures consist of open cracks and vertical dislocations or warps (0.1m maximum throw) with an orientation of N130 degrees-140 degrees. Small triggered slip and shaking effects also took place along nearby synthetic and antithetic normal faults. The observed limited extent and small surface displacement of the Paganica ruptures with respect to the height of the fault scarps and vertical throws of palaeo-earthquakes along faults in the area put the faulting associated with the L'Aquila earthquake in perspective with respect to the maximum expected magnitude and the regional seismic hazard.
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