Applied Geophysics: High altitude weight drop seismic source shines in remote areas

09/10/2001
Weight drop systems were some of the earliest, and in some areas most successful, seismic source systems ever used. Traditional systems typically used a 3-ton weight mounted on the back of a large truck which was allowed to free fall to the ground, thus generating a seismic "thump."Weight drop systems are not currently popular and have largely been replaced with dynamite and Vibroseis sources for land exploration.Dynamite has the advantage that it is easy to generate a very large impulsive energy source, and Vibroseis has the potential advantage of controlling the signal that is transmitted into the ground. However, both systems can be expensive and require a relatively large &q...
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