Assessment of seismic slope stability at different scales in molise region (Southern Italy)

The Molise Region (Central-Southern Italy) is an area characterized by a high susceptibility for rotational and translation landslides and by the presence of several active seismogenic sources. In this study, the well-known approach for the prediction of seismic displacements of slopes proposed by Newmark is applied at this specific area to obtain a level II zonation of the district. To work at large scale level, we carried out some hypotheses: infinite slope, limit cases for water table and seismic motion characterized through the assessment of PGA at surface following the maximum historical earthquake criterion. We adopted appropriate empirical relationships to predict induced displacements. The results in terms of forecasted seismic displacements were compared for a specific case study of an unstable slope in the village of Roccavivara (CB). There, rigorous Newmark analysis (level III), successfully support the large-scale approach.