ON THE AFTERSHOCKS OF SOME STRONG EARTHQUAKES IN THE SOUTH-EAST OF KAZAKHSTAN
DOI:
https://doi.org/10.26577/JPEOS.2023.v25.i3-4.i2Keywords:
seismicity, strong earthquakes, aftershocks, geological structures, the law of attenuation of aftershocks.Abstract
The proposed article presents the results of a comprehensive study of the aftershocks of some strong earthquakes in the south-east of Kazakhstan during the period 1960-2023.
Strong earthquakes in the studied region are accompanied by numerous aftershocks, therefore it is very important to consider the behavior of aftershock attenuation processes in more detail. The relevance of this topic determines the subject, the object, as well as the choice of the method of research. Special attention was paid to the spatial and temporal distribution of aftershocks relative to the epicenters of strong earthquakes during the period 2016-2023. For the research, an earthquake catalog was used for the territory of 39-47°N, 70-85°E with an energy class K≥7.
The results of the research are schematic maps of strong earthquakes and their aftershocks that occurred in the last few years in the selected study area. The statistics of the number of aftershocks after strong earthquakes have occurred are presented, the time dependence of strong earthquakes (main aftershocks) and their aftershocks in the time interval 2016-2023, which occurred on the territory of 39-46°N, 70-85°E is constructed. A qualitative analysis of the results obtained makes it possible to more clearly understand the physical and mechanical conditions of the occurrence of aftershocks after strong earthquakes and to understand in detail the law of attenuation of aftershocks.
