METHOD OF DETECTION AND IDENTIFICATION OF REMOTE EXPLOSIONS,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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A method of recording remote explosions with asynchronous accumulation of signals is described, making it possible directly, with recordings with accumulation, to determine the sign of the first arrival of waves. During recording of weak remote explosions and earthquakes, it is very difficult, and sometimes completely impossible, to isolate, on seismograms, the actual first arrivals of waves. Due to damping of oscillations with distance, the first oscillations at remote points, with respect to arrival time, may not be noticed and the arrival of more intense subsequent oscillations are taken as the first arrivals, which leads to errors during interpretation of seismograms. Identification of first arrival time waves on seismograms of remote recording stations, which is required for construction of hodographs and geological sections, and also for determination of direction to the source of the oscillations and its location, becomes impossible. The criterion of distinction of explosions from earthquakes is also violated.