WUSHI MS7.1 EARTHQUAKE SEQUENCE RELOCATION RESEARCH ON JANUARY 23,2024
In order to further study Wushi MS7.1 earthquake,double-difference seismic position method was used to relocate the seismic sequence,and the positioning results showed that:① after relocation,the spatial position of the mainshock did not change much.It was 2 km away from the position before relocation,and the depth was 25.6 km,which was deeper than that before reloca-tion.② After reposition,earthquake sequence had a tendency to develop southward along the Maid-an fault,which was basically consistent with the distribution characteristics of disasters.③ When the Maidan fault was extruded by the piedmont extrusion,it was stopped near the epicenter of the main-shock,and the seismic structure of the Wushi section of the Maidan fault was deeper than that of the Aheqi section,and the activity was relatively weak,so there were more and shallow aftershocks in the SW direction and fewer and deeper aftershocks in the NE direction in the mainshock epicenter.
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