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.

中文翻译：

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贝加尔湖南部地区 Bystrinskii 地震（2020 年 9 月 21 日，M w = 5.4）：焦点向元不稳定状态过渡的一般特征、基本参数和变形迹象

摘要

介绍了对贝加尔湖南部地区 2020 年 9 月 21 日的 Bystrinskii 地震的研究结果。指出了其地球动力学位置、震源机制和基本参数。提供了地震前6天的岩石变形异常增长的变形监测数据。结果表明，地震前的变形过程情景与间歇“粘滑”过程实验模拟中准备动态滑移的情景相似。基于自然界和模型中变形过程实现的相似性，指出在Bystrinskii地震之前出现的变形异常是一种规律现象，可以认为是其短期前兆。