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AMBIENT SEISMIC NOISE VARIATIONS BEFORE EARTHQUAKES IN THE BAIKAL RIFT SYSTEM
oleh: S. A. Korol, A. V. Sankov, A. A. Dobrynina, V. A. Sankov
Format: | Article |
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Diterbitkan: | Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust 2022-06-01 |
Deskripsi
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.