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Maping the Barsukovskaya cave by passive seismic method of standing waves

The karst cave was mapped using microseisms recorded on the earth's surface. The research method is based on the effect of standing waves generation by microseisms over the cave. The accumulation of amplitude spectra of microseisms allows one to determine the frequencies of the first few modes of these waves. A map of frequency of lowest mode was constructed at the survey site. This map shows the structure of the cave in plan, as confirmed by a comparison with the cave scheme drawn up earlier by cavers.