Regional scale shear wave velocity profiles for ground response analyses uncertainties evaluations – the Piedmont Region (NW Italy) Database

Abstract. The prediction of earthquake ground motions, and consequent seismic hazard of a specific area of study, is usually based on ground response evaluations of a statistical representative sample of possible soil and rock profiles. With this aim shear wave velocity (Vs) properties of the profiles are of paramount importance, given that uncertainty in this parameter play a major role in ground motion prediction and in its variability. Usually, stochastic procedures are adopted to model this uncertainty, and several stochastic approaches have been developed. These approaches should be however calibrated on detailed geological-geomorphological information and specific Vs profiles databases. Within this context the present paper is aimed to provide a new extensive database of Vs profiles over the Piedmont Region (NW Italy). These data are obtained through a specific workflow developed for their evaluation at the regional scale merging the information of specific geological-geomorphological modelling and devoted geophysical data collection. The obtained database (https://doi.org/10.5281/zenodo.13685087) could be used as the basis of Vs randomization approaches also in different geological contexts and results from the specific data analyses performed could be adopted as reference for similar materials in analogous geological contexts.