The possibility of complex studying for the geological environment during seismicecological monitoring in areas of increased environmental danger

Abstract

Relevance. The relevance of this article is to show the possibility of obtaining not only a twodimensional, but also a three-dimensional idea about the depth and speed structure of the object during researching by local seismic-ecological monitoring (LSEM), as well as to analyze three-dimensional models of indicators of the stress state of the geological environment over time. LSEM is carried out in limited areas in order to assess the degree of environmental safety and reduce the risk of natural hazards at the stage of observation during the construction and operation of facilities of special importance, such as hydroelectric power stations, nuclear power plants, subsoil use facilities, as well as megalopolis. Aim. The purpose of this article is to show the results of a three-dimensional complex study of the environment using local seismic -ecological monitoring at real objects for the Balakovo NPP region and the Moscow megalopolis. Methods. Based on the kinematics of the converted waves PS from distant earthquakes, data were obtained on the relief of deep borders and the speed structure of the studied regions. Three-dimensional models of deep and speed structure were built. Based on the energy of converted waves from distant earthquakes, the anisotropostig indicator γ and the stress state indicator of medium S for different depth levels and different time observation intervals for the area of the planned Tver NPP were estimated. Results. Three-dimensional models of the anisotropy indicator γ are built. The obtained three-dimensional models of the anisotropy indicator γ and the assessment of the indicator S revealed the anomalies of the indicator γ, the amplification and disappearance of these anomalies in space and in time, as well as the influence of a distant catastrophic earthquake from the Alaska region on the change in the values of geodynamic indicators. It was concluded that when conducting local seismic-ecological monitoring (LSEM) in different study areas, it is possible to build three-dimensional models of the depth and speed structure of the studied region, as well as to study the distribution of geodynamic indicators of anisotropy of γ and stress state S in different depth ranges and for different time observation intervals, and as a result, to build three-dimensional models characterizing the stressed state of the region in time.