The use of vibrators, as sources for seismic exploration of the Barth, have in the past been limited to large expensive surveys . To provide a broader range of exploration witti the advantages of a vibratory source, we have developed a small economical vibrator. Sources for use in shallow seismic surveys have in the past been impulsive . The acoustic energy was released in a short time at a high amplitude. The largest amounts of energy veere generated witti explosiees. Explosives are becoming more difficult to obtain and provide minimal control over the produced spectra. With a small vibrator acoustic energy can be released slowly, to sum to a large quantity, causing minimal environmental damage with maximum spectra control .


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