Open AccessAMBIENT SEISMIC NOISE VARIATIONS BEFORE EARTHQUAKES IN THE BAIKAL RIFT SYSTEM
Author(s) -
S. A. Korol,
A. V. Sankov,
А. А. Добрынина,
V. A. Sankov
Publication year - 2022
Publication title -
geodinamika i tektonofizika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.336
H-Index - 8
ISSN - 2078-502X
DOI - 10.5800/gt-2022-13-2s-0632
Subject(s) - seismology , ambient noise level , geology , seismic noise , rift , shock (circulatory) , noise (video) , geomorphology , sound (geography) , medicine , artificial intelligence , computer science , image (mathematics) , tectonics
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.