In exploration seismology, a charge of dynamite is exploded under controlled conditions, and the resulting vibrations at various points on the surface of the ground are detected by geophones and are recorded as seismic traces on the seismogram. The analysis of such seismic records yields valuable information about the structure of the sedimentary rock layers in potential oil producing areas, and such information is of considerable economic value in increasing the probability of locating new oil fields.

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