  Recent satellite and ground-based observations proved that in earthquake
preparation period in the seismogenic area we have VLF/LF and ULF
electromagnetic emissions. According to the opinion of the authors of the
present paper this phenomenon is more universal and reliable than other
earthquake indicators. Hypothetically, in case of availability of adequate
methodological grounds, in the nearest future, earth VLF/LF electromagnetic
emission might be declared as the main precursor of earthquake. In particular,
permanent monitoring of frequency spectrum of earth electromagnetic emission
generated in the earthquake preparation period might turn out very useful with
the view of prediction of large (M 5) inland earthquakes. The present paper
offers a scheme of the methodology according to which the reality of the above
given hypothesis can be checked up. To prove the prediction capabilities of
earth electromagnetic emission we have used avalanche-like unstable model of
fault formation and an analogous model of electromagnetic contour, synthesis of
which, according to our opinion, is rather harmonious.

Geophysics