AMBIENT SEISMIC NOISE VARIATIONS BEFORE EARTHQUAKES IN THE BAIKAL RIFT SYSTEM
https://doi.org/10.5800/GT-2022-13-2s-0632
Abstract
This paper proposes a method to observe the pre-earthquake features based on the variations in ambient noises using local moderate and strong seismic events as an example. Eight earthquakes in the Baikal rift system with energy classes K=10.1–15.9 were associated to a significant decrease in the level of ambient noises at epicentral distances from 3 to 81 km a few hours before the shock. The observed decrease in the ambient noise level can be classified as a short-term precursor of the medium consolidation 4–5 hours before the earthquake.
Keywords
Supporting agencies: The works of S.A. Korol and A.V. Sankov were done as a part of the project of the Ministry of Science and Higher Education of the Russian Federation 075-15-2020-787 "Basic grounds, methods and technologies of digital monitoring and ecological forecasting for the Baikal Natural Territory". The works of A.A. Dobrynina and V.A. Sankov were supported by the Russian Fund of Basic Researches (project 21-55-53019_ NSFC-a).
About the Authors
S. A. Korol
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
128 Lermontov St, Irkutsk 664033
A. V. Sankov
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
128 Lermontov St, Irkutsk 664033
A. A. Dobrynina
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences; Geological Institute, Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
128 Lermontov St, Irkutsk 664033
Sakhyanova St, Ulan-Ude 670047, Republic of Buryatia
V. A. Sankov
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences; Irkutsk State University
Russian Federation
Russian Federation
128 Lermontov St, Irkutsk 664033
3 Karl Marx St, Irkutsk 664011
References
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Review
For citations:
Korol S.A., Sankov A.V., Dobrynina A.A., Sankov V.A. AMBIENT SEISMIC NOISE VARIATIONS BEFORE EARTHQUAKES IN THE BAIKAL RIFT SYSTEM. Geodynamics & Tectonophysics. 2022;13(2):0632. (In Russ.) https://doi.org/10.5800/GT-2022-13-2s-0632
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