Abstract:Using 3848 P-wave arrival times of 593 earthquakes in the northern Greater Khingan range area from observation data of Inner Mongolia seismic network from January 1, 2009 to March 30, 2017, 1-D crustal P-wave velocity model, relocation and station correction value are inversed. The results of different initial models converge reasonably well, and through the speed disturbance test, the inversion result is relatively stable. The results obtained by joint inversion show the lateral heterogeneity of the crustal velocity and the wave velocity abnormality below the stations. The velocity of the southeast side of the northern segment of Greater Khingan range is higher than that of the northwest side. In the relocation results obtained by joint inversion, the location of the epicenter is more convergent in space. The focal depth profile shows that focal depth of the northwest side is shallow, yet deep in the southeast. In the Greater Khingan range ridge area, the focal depth distribution has a deeper lower limit.
ZHANG Fan,HAN Xiaoming,LI Juan et al. Minimum 1-D Velocity Model Inversion and Seismic Relocation of Northern Segment of Greater Khingan Range Uplift[J]. jgg, 2018, 38(8): 777-782.