Seismic surface methods are widely recognised has being the most cost effective way of evaluating seismic velocity in large areas, especially in sedimentary deposits were the soil profile is usually characterized by a seismic velocity increase with depth. In the case of volcanic massifs, it's common to have volcanic rock layers enclosed in volcanic sedimentary deposits, and in this case the isolated use of seismic surface methods can provide multiple models for the same field data. In this paper is going to be described a case study, of the combined use of various surface and borehole seismic techniques, in the determining of the site P and S wave seismic velocity profile. The results obtained from this tests, allowed the comparing of results and discussing of the advantages and limitations in its use.
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