A preliminary catalog of early aftershocks following the 7 January 2025 M_S6.8 Dingri, Xizang earthquake

We present a preliminary catalog of the early aftershocks following the January 7, 2025, M_S 6.8 ( M_W 7.1) Dingri mainshock. Shortly after the occurrence of the mainshock, a dense nodal seismic array was deployed around the seismogenic zone. Using the collected continuous seismic waveforms and AI-based technique, we automatically detected and located 30,440 early aftershocks between January 8 and January 18. The preliminary catalog of early aftershocks was then generated by combining China Earthquake Networks Center (CENC) catalog (spanning the first ~1.2 days) and the aftershocks detected in this study. This combined catalog includes 31,038 earthquakes, with local magnitudes between 0.1 and 5.1. The spatial distributions of early aftershocks reveals three main fault segments with different strike and dipping orientations, likely reflecting the complex fault structures of the near north-south rifts in southern Tibet (“southern Tibet rifts”), potentially influenced by the South Tibet Detachment System (STDS). Our study demonstrates that the rapid deployment of the dense nodal array significantly improves the resolution of fault structures and provides valuable insights for timely earthquake hazard assessment and seismic risk mitigation.