Passive seismic surveys have become popular in the last decades. Especially because it shows a high capacity for seismic subsoil characterization for a cheap cost. In particular, it is largely used for identification of seismic amplification site effects. The results have the capacity to define areas with the same seismic behaviour, more precisely whether the ground motion generated by a possible earthquake will be amplified or not.
To furnish the results, a large area was covered by the HVSR (Horizontal to Vertical Spectral Ratio) single station survey. In addition, few array multi-sensor configurations have been set. The correlation of all results aim to obtain the shear wave velocity - depth profiles and the identification of areas susceptible of seismic motion amplification. As well, another goal of this work is to clarify the presence of the Rapolano Fault (an important geological structure that delimits the East margin of the Siena basin). Finally, this study aspires to confirm the capability of the passive seismic prospecting techniques
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