Abstract
The results of studying the Bystrinskii earthquake of September 21, 2020, in the southern Baikal region are presented. Its geodynamic position, focal mechanism, and basic parameters are indicated. The deformation monitoring data showing six days of anomalous growth of rock deformations preceding the earthquake are provided. It is shown that the scenario of the deformation process before the earthquake is similar to the scenario of preparing dynamic slip during the experimental simulation of the intermittent “stick–slip” process. On the basis of similarity in the implementation of deformation processes in nature and in the model, it is stated that the deformation anomaly, which appeared just before the Bystrinskii earthquake, is a regular phenomenon and can be considered as its short-term precursor.
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REFERENCES
L. N. Brillouin, Scientific Uncertainty and Information (Acad. Press, 1964).
A. A. Dobrynina, Izv., Phys. Solid Earth 45 (12), 1093–1110 (2009).
D. N. Zubarev, V. G. Morozov, and G. Repke, Statistical Mechanics of Nonequilibrium Processes (Fizmatlit, Moscow, 2002) [in Russian].
D. V. Salko and S. A. Bornyakov, Pribory, No. 6, 24–28 (2014).
W. F. Brace and J. D. Byerlee, Science 153, 990–992 (1966).
A. A. Dobrynina, V. A. Sankov, V. V. Chechelnitsky, and J. Déverchère, Tectonophysics 675, 50–68 (2016).
J. Ma, S. I. Sherman, and Y. S. Guo, Sci. China Earth Sci. 55, 869–881 (2012).
J. Ma, Y. Guo, and S. I. Sherman, Geodyn. Tectonophys., No. 2, 87–99 (2014).
ACKNOWLEDGMENTS
We are grateful to the Baikal and Buryat Branches of the Federal Research Center Unified Geophysical Service of the Russian Academy of Sciences, the Center for Implementation of Measures for Environmental Resources Management in Krasnoyarsk Krai, the Institute of Astronomy and Geophysics of the Mongolian Academy of Sciences, and the Incorporated Research Institutions for Seismology for providing the records of waveforms of the earthquakes.
Funding
This work was supported by the Russian Foundation for Basic Research and the National Natural Science Foundation of China under scientific project no. 21-55-53019 using the unique scientific installation “Southern Baikal Instrumental Complex for Monitoring Hazardous Geodynamic Processes.”
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Translated by L. Mukhortova
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Bornyakov, S.A., Dobrynina, A.A., Seminsky, K.Z. et al. The Bystrinskii Earthquake in the Southern Baikal Region (Sep. 21, 2020, M w = 5.4): General Characteristics, Basic Parameters, and Deformation Signs of the Transition of the Focus to the Meta-Unstable State. Dokl. Earth Sc. 498, 427–431 (2021). https://doi.org/10.1134/S1028334X21050044
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DOI: https://doi.org/10.1134/S1028334X21050044