Radon as the 'determined' indicator of the natural and technological geodynamic processes

Radon is considered as one of real precursors of such geodynamic phenomena as mountain impacts in deep mines and tectonic earthquakes. However physical communication between volumetric activity of radon (VAR) and the intense condition of a massif until recently was not absolutely clear. The radonic monitoring which has been carried out in deep mines, has shown, that VAR precisely fixes zones of compression and a stretching of a massif. Realization of soil radon monitoring in seismogenetic region has found out, that behavior VAR reflects compression and a stretching of a massif which are shown in conditions of a bend of a massif surface caused by geodynamic processes. On the basis of the carried out experiments the new model of preparation of geodynamic events is offered.