A multidisciplinary approach for the seismic characterization of the Cassino plain (Central italy)

Thanks to its geological, hydrogeological and historical features, the Cassino basin is one of the most important areas of central Italy. More than two hundred soil borings, some of them reaching depths as high as 100 m, have revealed a subsoil characterized by a calcareous platform and post-orogenetic series forming a tectonic basin filled by lacustrine and volcanic deposits. Together with the borehole data, a series of microtremor measurements have been performed to estimate the natural frequency of oscillation of the more deformable deposits to study at a very detailed scale the seismic response of the site. The combination of geophysical data with the information given by the deep boreholes, permitted to rebuild the geological complexities of the tectonically driven seismic bedrock, outcropping continuously at east and west of the basin. This study forms the basis for numerical analyses aimed at predicting the unknown local amplification effects.