Abstract
The earthquake of 26 September 1997 in central Italy is one of the largest seismic events of the last 20 years in Italy. It caused significant damage in a large area of Umbria and Marche Regions and site amplification phenomena were recorded even at large distances from the epicentre. As the damaged area is located on the Apennine mountains, local soil amplification, due to topographic effects, were highlighted. So a two dimensional code, based on the indirect boundary element method, has been used to investigate the phenomenon and also the effects of geometrical parameter changes. Finally general comments on numerical results of parametric studies are presented.
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