The source parameters of earthquakes of Bishkek geodynamic proving ground (Northern Tien Shan)

Автор: Sycheva Naylya
Журнал: EPJ Web of Conferences
Том: 254
Год издания: 2021
Первая страница: 1
Последняя страница: 13
DOI: 10.1051/epjconf/202125402016
Аннотация: Based on the method of polarity of signs of P-waves, the focalmechanisms of 1674 earthquakes with M  1.6, which occurred on theterritory of the Bishkek geodynamic proving ground (BGPG) from 1994 to2020, were determined. Some characteristics of the complete catalogue arepresented. Quantitative distributions by the type of mechanisms anddiagrams of azimuths of the main stress axes are constructed. A variety offocal mechanism of earthquake is observed, most of them are reverse fault,oblique reverse fault, and horizontal strike-slip fault. The compression axisfor most of the events has a north-northwest direction and a sub-horizontalposition. For 183, dynamic parameters (DP, source parameters) wereobtained: spectral density Ω0, corner frequency f0, scalar seismic momentM0, source radius (Brune radius) r, and stress drop Δσ. The correlationsbetween DP and energy characteristic (magnitude) and scalar seismicmoment are investigated. The smallest correlation coefficient was obtainedfor stress drop.
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