Assessment of the Level and Spectral Characteristics of Seismic Impacts on Hydropower Areas in Siberia

This paper examines areas of seismic activity in Southern Siberia. It is shown that the potential earthquake source (PES) zone model created for the general seismic zoning does not fully correspond to the data on the seismic activity of the region. For seismic stations at and near hydroelectric dams, a study of seismograms of large earthquakes from different epicentral zones of natural seismicity, as well as records of the largest man-made earthquakes in the region, has been carried out. Attention is paid to platform earthquakes in the areas of hydroelectric power stations. Current power spectra are studied, which show the level of influence of signals against the background of industrial noise and microseisms, and the frequency composition and duration of seismic vibrations of dams during different earthquakes is determined. This work is the first step towards assessing the impacts of earthquakes from the most active epicentral zones on hydroelectric power stations in Siberia, taking into account the real characteristics of the signals. The level of seismic effect of industrial explosions in the region is considered. The research is aimed at clarifying and improving seismic zoning in the areas where hydropower structures are located in Southern Siberia.