GEOPHYSICAL METHODS
Seismic Refraction Surveys
Seismic technique is one of the most developed geophysical techniques, providing vital information on subsurface, crucial for most of the engineering projects. More...
Basic Principle:
Seismic refraction consists of recording the length of time taken for an artificially provoked surface vibration to propagate through the earth. By processing the data recorded at various sensors absolute velocities, velocity contrasts and the depths of the underlying layers are determined. These results give information about the nature and thickness of overburden (alluvium deposits), surface of bedrock, the depth of weathering zones in the rock mass, location of geological boundaries and identifies faults or weak zones, scale and width, etc.
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