Abstract

The epicenter field of earthquakes that occur in the Baikal Rift System (BRS) was analyzed to identify certain areas that have stable concentrations of seismic events; these are reflections (in time) of deformable earthquake-generating volumes in the tectonosphere, or earthquake-generating structures. The patterns that are identifiable in the interrelationships and interactions of earthquake-generating structures as found by analysis of the space-time characteristics of the seismic process characterize the present-day dynamics of the BRS. Time series of earthquake-generating structures were analyzed for the 1964–2002 period using the following parameters: the number of earthquakes (N) and the logarithm of total energy released by the earthquakes (log Esum). The tool was frequency-time analysis (FTAN), which revealed dominant periodic components in the seismic process for each earthquake-generating structure. We also used correlation analysis based on the parameter N to determine the order of activation for the earthquake-generating structures and to identify periods of synchronization in the seismic process.

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