Abstract
Results of seismic investigation of the underground nuclear explosions area at the Semipalatinsk test site are considered. Using refracted waves method subsurface zones of surrounding geological media disintegration were revealed. These zones are characterized by decrease of P and S waves velocity on the value of 0,5-1,5 km/s and increase of Poisson coefficient on 0,07. Estimation of the induced fracturing was done; parameter of crack density measures up to 0,45.
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