SPECTRAL and SOURCE EARTHQUAKE PARAMETERS on NORTHERN CAUCASUS
The dynamic parameters of of 18 earthquakes sources in the North Caucasus for 2013 with К Р =10.0-12.9, determined from 64 amplitude spectra of S -waves are given. Records of three regional digital seismic stations, “Anapa”, “Kislovodsk” and “Sochi” are used. They are located no more than 300 km from the sources. The records of the “Makhachkala” station were used in a test mode. For the environment near these stations, the values of the frequency-dependent Q -factor, necessary for recalculating the station spectra to the focal ones, were obtained earlier. In 2013, the largest number of studied earthquakes was located in the Eastern Caucasus. The dependence of log M 0 and К Р for this zone was established with use of the data obtained in 2010-2013. Compared to the similar equation of world average dependence (Riznichenko, 1976), our dependence is in a good agreement with it by the slope, but the free term exceeds the same in the world average dependence by almost two units.