The 1998-1999 Pollino (Southern Apennines, Italy) seismic crisis: tomography of a sequence

I. Guerra, P. Harabaglia, A. Gervasi, A. B. Rosa

Abstract


In 1998-1999 a seismic sequence occurred in the Southern Apennines, after the moderate size (mb=5.0) 9th September
1998 Pollino earthquake. It lasted about 14 months and was clearly localized to the sole north-west area
of the main shock epicenter. Its peculiarity consisted in sudden changes of activity from a series of normal faults
with Apenninic (NW-SE) trend and transfer, presumably strike slip, faults with Antiapenninic (NE-SW) and E-W
trend. The complexity of the behavior and the different orientations of the activated systems suggest that the area
acts as a hinge between the NW-SE trending Southern Apennines and the locally N-S trending Calabrian Arc.

Keywords


seismic sequences;stress field evolution;Southern Apennines;Calabrian Arc;Pollino Chain

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References


DOI: https://doi.org/10.4401/ag-3249
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X