![]() These velocity maps provide information on the gradiential changes in material stiffness. Large contrasts in the density of the subsurface can be measured, modelled and displayed in a seismic velocity map or cross-section format (P-wave, Shear-wave). In both cases changes in geological material density can highly influence the propagation of a seismic wave through the subsurface. using seismic refraction, surface-wave methods) and the presence of geological layers due to their seismic reflectivity (e.g. ![]() ![]() Seismic methods can provide valuable information of the subsurface, such as the seismic velocity structure of the geology (e.g. ![]()
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