Mathematics – Logic
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..895c&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 7, p. 895-898
Mathematics
Logic
10
Structural Geology: Fractures And Faults, Seismology: Seismicity And Seismotectonics, Information Related To Geographic Region: Europe
Scientific paper
A field survey performed during the 1997 Umbria-Marche earthquake sequence led us to recognize ground and pavement ruptures associated with the three largest shocks (Mw>=5.7). The ruptures are concentrated in narrow bands that, in part, are on and near previously mapped high-angle normal faults. The geometry of the ground deformation is consistent with the NE-trending extension indicated by CMT focal solutions of the mainshocks. The distribution of aftershocks suggests that the three mainshocks occurred on ~40° SW-dipping normal faults. Geological investigations, modelling of expected coseismic elevation changes, and seismic data, suggest that the surface deformation is not the direct result of primary rupture of faults at depth.
Cinti F. R.
Cucci Luigi
Marra Fabrizio
Montone Paola
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