Abstract
Various characteristics of seismic process on the territory of Bishkek geodynamic proving ground are considered. Seismicity analysis is performed on the basis of earthquake catalogue, according to KNET network data. The catalog includes more than 10,000 seismic events that occurred from 1994 to 2019. To describe the energy distribution function of earthquakes, the Gutenberg - Richter law was used, as well as the position of nonequilibrium thermodynamics with the use of Tsallis statistics, which generalizes classical thermodynamics to the case of nonextensive systems. It is shown that the flow of earthquakes on the territory of the Bishkek geodynamic proving ground is a system with memory and long-range spatial correlations, and the study region itself is characterized as seismically active. The following seismic process characteristics are distributed in space and in time:KSRseismogenic fracture parameter, seismotectonic deformation intensity, seismic activity, Tsallis parameterqand constantsa, as well as a parameter characterizing the slope of the repeatability graph (b-value).
Highlights
The Bishkek geodynamic proving ground (BGP, Northern Tien Shan), limited to 41.5 ° -43.5 ° N and 73 ° -77 ° E, lies within the central segment of the North Tien Shan seismogenerating zone and is the junction zone of the Tien Shan orogen and the Turan Plate
To calculate the distribution of the studied parameters over the territory of the BGP, the geostructural region was subdivided into unit cells with a size of 0.5° and the shift was 0.25°
Various parameters characterizing the seismic process of the Bishkek geodynamic test site are considered - seismic activity, seismotectonic deformation (STD) intensity, seismogenic fracture parameter, Tsallis parameters q and a, as well as the inclination angle (b-value) of the Gutenberg - Richter distribution
Summary
The Bishkek geodynamic proving ground (BGP, Northern Tien Shan), limited to 41.5 ° -43.5 ° N and 73 ° -77 ° E, lies within the central segment of the North Tien Shan seismogenerating zone and is the junction zone of the Tien Shan orogen and the Turan Plate. To the west are the Talas, Bolshoi and Maly Karatau ridges, and to the east - the Kungei-Alatau and Terskey-Alatau ridges with the Issyk-Kul intermountain depression separating them. The peculiarity of the seismic regime of the Northern Tien Shan is due to the geological structure, the intensity of the geodynamic processes occurring here and is associated with the ancient deep faults - the North Tien Shan, Kemin and Kungei. Such destructive earthquakes as Chilikskoe M = 8.3 1889, Zhalanash-Tyupskoe M = 6.8 1978, Sarykamyrskoe M = 6.8 1970, Vernenskoe M = 7.3 1887, Keminskoe M = 8.2 1911 occurred on its territory.
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