Home – Home – Jornals – Russian Geology and Geophysics 2018 number Неопубликованное

Using a complex of geophysical, seismotectonic and engineering-seismological studies and the proposed methodological approaches, an assessment of seismic effects at various levels of seismic hazard zoning of the Central Baikal territories is given. The implemented approaches are substantiated by identifying zones of probable occurrence of large earthquakes and specifying their main indicators necessary for the most justified assignment of initial signals corresponding to the parameters of predicted large earthquakes. The basis for the reliability of the selected approaches and methods, in relation to specifying the initial seismicity, are the manifestations of previously registered relatively large earthquakes in the studied territory and, in the direction of seismic hazard zoning of specific territories on a probabilistic basis, the registered data on the behavior of coastal water-saturated massifs of loose sediments according to local earthquake records are quite reasonably accepted. The implemented approaches using a set of geophysical methods in the studied areas allow improving the methods of forecasting maximum seismic impacts for different soil conditions in order to obtain a set of seismic characteristics for them in the form of accelerograms, acceleration spectra, frequency curves and their parameters required for designing earthquake-resistant structures in the coastal areas of Lake Baikal. The studies carried out in this direction are presented using the example of a site located within the seismically active southeastern part of Central Baikal and on the worst soil conditions in relation to the manifestation of seismicity in its coastal areas.