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http://hdl.handle.net/2122/5005
Authors: | Giampiccolo, E.* Musumeci, C.* Falà, F.* Gresta, S.* |
Title: | Seismological investigations in the Gioia Tauro Basin (southern Calabria, Italy) | Issue Date: | Oct-2008 | Series/Report no.: | 5-6/51 (2008) | URI: | http://hdl.handle.net/2122/5005 | Keywords: | Southern Calabria Seismicity Stress tensor Attenuation Source parameters |
Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics | Abstract: | This study provides new seismological information to characterize the seismically active area of the Gioia Tauro basin (southern Calabria, Italy). Seismic activity recorded by a temporary network from 1985 to 1994 was analyzed for focal mechanisms, stress tensor inversion, P-wave seismic attenuation and earthquake source parameters estimation. Fault plane solutions of selected events showed a variety of different mechanisms, even if a prevalence of normal dip-slip solutions with prevalent rupture orientations occurring along ca. NE-SW directions was observed. Stress tensor inversion analysis disclosed a region governed mainly by a NW-SE extensional stress regime with a nearly vertical σ1. These results are consistent with the structure movements affecting the studied area and with geodetic data. Furthermore, evaluation of P-waves seismic attenuation and earthquake source parameters of a subset of events highlighted a strong heterogeneity of the crust and the presence of fault segments and/or weakened zones where great stress accumulation or long-rupture propagation are hindered. |
Appears in Collections: | Annals of Geophysics |
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03 Giampiccolo.pdf | 5.62 MB | Adobe PDF | View/Open |
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