this work has been carried out in the frame of the Project PON Smart Cities called SIGLOD and was aimed at the analysis of the seismic features for three specific sites of the Sicilian region (Bellolampo, PA; Siculiana, AG and Cava dei Modicani, RG). The study has been conducted using different kinds of data and methodologies, also including innovative ideas: firstly, the main seismogenic structures existing in Sicily and in the surrounding areas have been identified; then, the available information on the historical seismicity of the considered territory and on the cynematics of the recognized seismogenic structures has been evaluated. This information has then been introduced as input to an algorithm of earthquake simulator, which allowed the compilation of a synthetic seismic catalogue lasting 100,000 years for the whole territory of Sicily. This catalogue has been statistically analysed in order to obtain the recurrence time and the occurence probability of large earthquakes in the considered area. Lastly, an attenuation law has been applied to all the events reported in the synthetic catalogue for the estimation of the exceedance probability of given values of peak acceleration (PGA) on the sites considered in the project.