A priliminary study on the sequence characteristics and focal mechanism solution of the Jiashi strong earthquake swarm

The sequence characteristics and focal mechanism solution of the Jiashi, Xinjiang strong earthquake swarm are analyzed and studied in this paper. The result shows that before the M _S=6.6 earthquake, value h of sequence frequency attenuation coefficient was less than 1, then value h was more than 1. Before occurrence of M _s≥6.0 earthquakes the energy is released either in a continuously-strengthened way or a sharply-strengthened way, and before M _s≥5.0 earthquakes the sequence frequency shows calm. The study on the focal mechanism solution of the strong earthquake swarm shows that the source faults are mainly in a right-lateral, strike-slip way and the faults have characteristics of tensor-shear.