Аннотация:In the study, seismic moment tensors (SMT) of 177 earthquakes in the Central Tien Shanwith K ≥10.5 (M ≥ 3.6) occurring from 2007 to 2017 are determined on the basis of the wave inversion method and data from the KNET seismic network. The 177 obtained solutions have been addedto an SMT catalogue, which includes 284 events with 2.8 ≤ M ≤ 6 that have occurred from 1996 to 2017.Some characteristics of the SMT catalogue are discussed along with constructed principal stress axesazimuth diagrams and dip angle distribution graphs. For the most part of events, the compression axisof the seismic events has a north-northwest direction and a subhorizontal orientation; the directionof the tension axis does not have a pronounced maximum, while for most events it has a subverticalorientation. In addition to the scalar seismic moment, the dynamic parameters (DP) of the 150 eventsfrom the SMT catalogue that have occurred from 1999 to 2014 were computed: the source radius(Brune radius) and tangential stress drop. Studied correlations between the DP and magnitude showthe link between the stress drop and earthquake magnitude to be the weakest. The Lode–Nadai factordistribution on the grounds of the seismic moment tensors from the SMT catalogue was constructedand the deformation types typical for the studied area were identified. A comparison between deformation regimes and stress drop values is presented.
