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The Grandori model: Anisotropic formulation and its application in the plotting of seismic hazard maps
Authors:E Stillitani  A Teramo  A Bottari
Institution:(1) Istituto Geofisico e Geodetico, University of Messina via Osservatorio, 4 98121 Messina, Italy
Abstract:The seismic hazard for the Calabro-Sicilian area is evaluated using an anisotropic formulation of the Grandori attenuation law. For each macroseismic field two main directions are identified: minimum and maximum attenuation of the macroseismic intensity. The results of the investigation show that the anisotropic formulation improves the compatibility level of the model (with respect to the isotropic one) with the intensities observed and produces probabilistic expected intensities which compare favourably with the values of seismic history in the investigated area when the zonation defined by the Messina University research group was used.
Keywords:Attenuation model  anisotropy  seismic hazard  Calabro-Sicilian area
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