Relationship of the Latest Seismicity of an Active Fault with Variations of Geophysical Fields

Abstract

With using of geophysical equipment deployed in the vicinity of the active southern Sakhalin fault, variations of natural geophysical fields were obtained and studied. It is shown that a significant change in the background values of subsurface radon and telluric potentials occurs some time before the seismic event in the instrument observation area, as well as after the events. Together with the medium-term earthquake forecast and geomechanical modeling, these observations can significantly detail the place of preparation for an earthquake, as well as monitor the subsequent development of the implementation of seismic events.