Assessment of the geoenvironment stress state at the Caucasian mineral waters test plot using long-term seismic-ecological monitoring

Abstract

According to the results of continuous long-term seismic-ecological monitoring at the Caucasian Mineral Waters test plot (the seismic zone in the Cis-Elbrus region), data on the seismic velocity distribution pattern were obtained for the test plot territory. The high-speed structure is revealed, the horizontal dimensions of which do not allow predicting local earthquakes with a very high magnitude in this territory. Three-dimensional models of anisotropy index γ were obtained and the indexes of stress state S were estimated for different depths according to the interpretation results of converted PS waves from distant earthquakes. It is found that the distribution of the anisotropy index γ varies continuously by the depth, by the laterals and in time. The cyclic changes in the index S with time are noted for all depths.