Fig. 4From: Ambient noise tomography for a high-resolution 3D S-wave velocity model of the Kinki Region, Southwestern Japan, using dense seismic array dataThe initial S-wave velocity model used as a reference in the inversion process. The blue line and blue dots represent the average S-wave velocity model. The black dots represent all the interstation Rayleigh wave phase velocity dispersion curves measured using the zero-crossing method transformed to a depth–S-wave velocity approximationBack to article page