Soil type dependent spectral seismic hazard in Friuli-Venezia Giulia (NE Italy)

The results of the second phase of a study devoted to the seismic risk assessment for the Friuli - Venezia Giulia region (NE Italy) are presented in terms of peak ground and spectral acceleration maps. A seismogenic zonation of regional relevance has been used, and a detailed separation between rock and soil is introduced for characterising the local response. The definition of the sub-areas where geological and seismological characteristics are constant was obtained by an appropriate processing using GIS software. The hazard results, calculated by the application of a standard probabilistic approach, refer to the 475-year return period; peak ground and spectral acceleration maps show the contribution of actual mean soil