GNGTS 2018 - 37° Convegno Nazionale

664 GNGTS 2018 S essione 3.2 on the dispersion spectrum of Rayleigh waves and the experimental H/V spectrum, respectively. The model is modified to ensure that the theoretical curves overlap the experimental ones as much as possible; the model for which there is maximum overlap provides the Vs-depth profile relative to the examined site. The velocity-depth profile obtained (Fig. 2d) by the MASW survey shows a small velocity inversion in the shallow subsoil, under this seismo-stratigraphic layer the velocity tends to increase slowly with depth. The result of this active seismic survey confirm that the subsoil of investigated area is characterized by low shear wave velocity values. The noise samplings acquired along the six profiles highlighted in fig. 1d was further elaborated in order to obtained the related impedance contrast sections (Fig. 3). Substituted the V 0 value (shallow shear wave velocity) and α (proportionality coefficient between depth Fig. 3 - Impedance contrast sections obtained from seismic ambient noise samplings (see Fig. 1d for location).