Preliminary Seismic Hazard Assessment for the Italian Seismic Code

The GNDT seismic hazard assessment project for a future seismic zonation of the Italian territory is described and the first preliminary results are presented. They have been obtained by applying two methodologies (the Cornell approach and the mixed method), and refer to two stages of elaboration: after having summarised the products performed during a previous national project, and after the first release of the products developed ad hoc for the present GNDT project. Maps of horizontal and vertical PGA referring to 100 and 500 year return periods and maps of exceedance probability for intensity VII MCS in 50 years are shown and commented.