ml shear wave velocity tomography in turkish plateau

Turkish plateau consisted of several continental terranes amalgamated in the late tertiary (bozkurt et al., 2001). to study the gradient of lateral crustal thickness in turkey and to identify borders of different crustal blocks, we calculated a 2d ml shear wave velocity tomography map (maheri-peyrov et al., 2016) using the waveforms recorded by the koeri permanent seismic network and the european integrated data archive (eida). the ml velocity is very sensitive tolateral crustal thickness variations and varies between the velocity of lg and sn phases. for crustal earthquakes, the maximum amplitude of the ml shear wave usually belongs to lg wave with a group velocity interval of 2.8-3.5 km/s. paths with ml velocities faster than the interval are considered as blocking lg paths because the quality of lg wave propagation is sensitive to the gradient of crustal thickness (press et al., 1952).