The Barrier Method for Constructing the Radio-Wave System of Short-Term Foreshock Acquisition

The end of 20th century and the beginning of 21th century is characterized by cataclysms becoming more frequent. Earthquakes, sun X-ray fleshes, magnetic storms and a range of other geophysical effects among them takes a special danger for mankind.

The working out of corresponded system concepts is need for done in good time forecasting of such destructive for mankind situations, revealing of the factors, preceding to their arising. Their working out is possible on the basis of big scientific technical potential accumulated for the last decades while a large scale territorially distributed systems were established.

In this connection problem of discovering of earthquake forerunners takes special place.

In present work primary attention is paid to usage of global electromagnetic fields conducted by radiotehcnical systems for earthquake forerunners control.

The essence of the concept suggested is follows. It-s evident, that ultra song waves (ULW) have wave directoral character of transmission, where Earth-s surface is lower wall of spherical wave director while upper wall is lower field of ionosphere (D - field), which altitude fluctuated from 60 km in the afternoon to 100 km in the night. This altitude is comparable with wave-s length what stipulates wave director character of radiowaves transmission in ultra long wave diapason. Heterogeneities appearance in any walls of wave director or the director itself leads to change of phase speed and ULW attenuation. Heterogeneities appearance in wave detector are caused by changing of density of electrons in the region of growing earthquake.