New Data on Quasi-Periodical Regularities in Activation of Fractures in Real Time Based on Monitoring of Magnitudes of Seismic Events: Case Study of the Baikal Rift System

摘要

An algorithm for researching a quantitative index of seismic activity (QISA) of faults on the basis of geoin-formational technologies was proposed in [1]. The index provided a ranking of the faults by degrees of their recent activity on the real time scale and enabled analyses of contributions of faults varying in ranks in the seismic process. Being represented numerically, the index made it possible to unambiguously distinguish active, low-active, and inactive faults within the recent geological development stage. According to QISA, a number of faults in the Baikal rift system (BRS) were revealed to have been quasi-periodically reactivated. However, the QISA does not take into account the energy characteristic of the process and does not suggest any assessment of the geological and geophysical importance of the activation of individual faults and its possible consequences, which are linked to the prediction of strong seismic events.