Study of Seismic Moment Tensor Inversion by Multi-point Sources for Jishishan Ms6.2 Earthquake on December 18,2023,in Gansu Province,China
Based on the observed seismograms from the regional broadband digital seismic network,the multi-point source seismic moment tensor inversion method is employed to perform the seismic moment tensor inversion for the 2023 Jishishan Ms6.2 main earth-quake in Gansu Province,China.The results show that the NE dipping nodal surface(strike 312°,dip 48°,and rake 76°)of the focal mechanism solution is the seismogenic fault.The majority of seismic moments are released from the source to the ground surface along the direction of the slip vector of the focal mechanism solution(azimuth 236°,plunge 40.5°),and the main rupture lasts about 5.8 s.At the same time,the secondary bilateral rupture occurred on the fault plane in the rupture zone of the earthquake.
Jishishan Ms6.2 earthquakeSeismic moment tensorMulti-point sourceSeismogenic tectonic
NETL
NSTL
万方数据
