Modern Deformation Processes in the Earth’s Crust and Acoustic Noises in Boreholes

Measurement of acoustic noises of rocks in borehole allow to receive essentially new<br>information about modern dynamic processes in geological medium. Maximum<br>amplitudes of seismoacoustic signals in boreholes are being observed in the zones of<br>present-day active micromovements and timed spatially to the zones of faults, areas of<br>crushing and fracturing of rocks. The acoustic noises amplitude-frequency<br>composition depends on the physical-mechanical properties of rocks. Daily and semi<br>diurnal periods in temporal variations of acoustic noises, that are registered in pits<br>and boreholes, are caused by the influence of the Earth ‘s tides.