Nuove evidenze di correlazione tra l'attenuazione macrosismica ed i campi di lineamenti strutturali nell'Italia meridionale

Abstract

The analysis of a large number of macroseismic fields of past and recent<br />earthquakes in Southern Italy allows a wider check of a previous interpretative<br />model of the anisotropy of the regional macroseismic field, in the context of a more<br />recent point of view of the tectonics.<br />Our model is based on the hypothesis and analysis of the correlation between<br />the fields of structural lineaments, characterized by the frequence and cumulative<br />length, and the attenuation of the macroseismic intensity. We studied the physical<br />and geometric factors which control the propagation of the seismic waves which<br />determine the macroseismic intensity in a given place, and then considered the use<br />of the filtre carried out by the "warp" formed by the "Giant Craks".<br />The Irpinia earthquake on 23rd November 1980 is suitable for a general study<br />of the postulated correlation, due to the extent of its macroseimic field and the<br />different structural characteristics of the areas concerned.