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Space-time analysis of earthquake-generating structures in the Baikal Rift system

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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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Authors and Affiliations

  1. Institute of the Earth’s Crust, Siberian Branch, Russian Academy of Sciences, 128 ul. Lermontova, Irkutsk, 664033, Russia

    A. V. Novopashina, V. A. San’kov & V. Yu. Buddo

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  1. A. V. Novopashina
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  2. V. A. San’kov
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  3. V. Yu. Buddo
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Correspondence to A. V. Novopashina.

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Original Russian Text © A.V. Novopashina, V.A. San’kov, V.Yu. Buddo, 2012, published in Vulkanologiya i Seismologiya, 2012, No. 4, pp. 55–64.

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Novopashina, A.V., San’kov, V.A. & Buddo, V.Y. Space-time analysis of earthquake-generating structures in the Baikal Rift system. J. Volcanolog. Seismol. 6, 259–267 (2012). https://doi.org/10.1134/S0742046312040045

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