ESTIMATION OF THE PREMONITORY CRUSTAL DEFORMATIONS OCCURRING IN THE PREPARATION STAGE OF VRANCEA EARTHQUAKES

The Earth's surface deformations occurring in the preparation stage of the intermediate high magnitude Vrancea earthquakes ( M > ۷ ) which took place in this century ( November ۱۰, ۱۹۴۰, M = ۷.۴ and March ۴, ۱۹۷۷, M = ۷.۲ ) have been computed, and the maps with the distribution of the premonitory deformation values have been drawn up. Correlations with the spatial distributon of some other type phenomena, observed in the case of the Vrancea strong earthquakes and "a posteriori" considered as being premonitory phenomena, have been performed