Vs30 Mapping and Soil Classification in Tiznit Region Based On H/V Spectral Ration MethodFadoua Cherki, Mehdi Tadili, Benaissa Tadili and Nadia MhammdiE3S Web Conf., 607 (2025) 04004DOI: https://doi.org/10.1051/e3sconf/202560704004