f S Wave Depth Section as a ByProduct of Deep Reflection Profiling

The knowledge of the S-velocity structure is very important for geotechnical and earthqualce engineering. Direct measurements using downhole/crosshole methods are accurate but give only local information and are very expensive. In loose sediments the borehole S-velocity determination methods fall down. The S-refraction/ reflection methods give less accurate information (e.g. on important low velocity layers embedded) with relatively high costs.