MASW

In this method, the "overtone spectrum" (amplitude spectrum in the phase velocity-frequency range) is calculated for each of the individual recordings. Then, based on these "overtone spectra", the dispersion curves are extracted from the fundamental mode of the surface wave. By means of subsequent inversion of these dispersion curves, the velocity values of the S-wave for discrete depths are calculated for the respective center points of the pickup line. Finally, a 2D velocity field of the S-wave along the seismic pickup line is calculated from the computed 1D velocity profiles.

The MASW method is used, among other things, for the investigation of dams, karst areas, shallow fault zones, sites for structures (Vs30 value) or for general geotechnical investigations.