P133 SEISMIC-ELECTRIC BENCHMARKING OF SHALLOW SUBSURFACE HORIZONS AND DOME CAVITIES TATIANA V. SOROKINA and ANATOLI A. BOULYTCHOV Russian Academy of Science Siberian Branch Institute of Geophysics 3 Prospect Koptyug 630090 Novosibirsk Russia Abstract 1 Seismic-electric (SE) effect method was applied in field to foresee subsurface dome cave emptinesses and to benchmark underground water horizons. A source of seismic waves were blows of a heavy hammer or repeated powerful impulses of magnetostrictive installation. Main frequency used was 500 Hz. Passing layers the seismic wave caused electromagnetic fields on the boundary interfaces. Electric responses of these electromagnetic fields were measured on a


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