Application of Sponheuer and Blake models in the seismic hazard evaluation: The case of Messina Straits

Abstract

Attenuation is fundamental in the description of a seismic event, determining the spatial distribution of intensity associated with it. Knowing the influence of the attenuation coefficients on the values of the maximum expected intensity for North-Eastern Sicily, the necessity arises to quantify the “weight” of the attenuation models and of the respective coefficients on the intensity estimates.

The first evaluation is presented here using the Sponheuer and Blake models. The comparison of the maps of expected intensity, obtained from the cross-use of the laws allows the first critical estimate, showing the greater adaptability of the Sponheuer model to describe the attenuation of intensity for the investigated area.