Abstract:The article describes local microplastic inelasticity in loam during propagation of P-wave with a frequency of 240-1000 Hz between two shallow wells, one holding piezoelectric radiator and the other containing piezoelectric receiver. The seismic record displays microplasticity phenomenon as the step-wise changes of the signal amplitude with time and the flat sections in the curve from microsecond to dozens microseconds long. These plateaus create short-terms breaks of the process-the time lags that depend on t… Show more
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