Rapid report of source characteristics of 2025 M_S6.8 Dingri, Xizang earthquake sequence

Characteristics of the main shock and aftershocks of the Dingri M_S6.8 earthquake in the Xizang Autonomous region were determined by the double-difference location method using phase reports from Jan. 7 to Jan. 16, 2025. We find that the aftershocks were generally distributed in a near NS direction along the Dengmoduo fault, with a long axis of about 70 km. There is an obvious seismic gap to the north side of the main shock, which is consistent with the location of the maximum rupture point as revealed by surface survey of the rupture and inversion analysis of the rupture process. In addition, the aftershock distribution exhibits obvious north−south segmentation characteristics. These observations suggest that the seismic fault of the main shock was likely to have been the Dengmoduo fault, which is NS and slightly inclined to the west.