P053 THE BORNHEIM (GERMANY) TEST SITE – VALIDATION OF 3 DIFFERENT TECHNIQUES (ESAC NASW MASW) TO DERIVE S-WAVE VELOCITY PROFILES It is well known that the distribution of shear wave velocities in the sediments is a very important parameter for microzonation studies devoted to estimating possible amplification potential of the sedimentary cover (site effects). During recent years the estimation of shear wave velocities based on the analysis of surface waves have been widely improved in particular those using Rayleigh waves. Both active survey methods (MASW Park et al. 1999) based on the use of artificial seismic sources and passive ones


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