On January 7, 2025, at 09:05, an Mw 7.1 earthquake occurred in Tingri County, Xigaze, Tibet. The China Earthquake Networks Center (CENC) located the epicenter at 28.50°N, 87.45°E near Cogo Township, with a focal depth of 10 km. Field investigations identified the seismogenic structure as the Dingmuco Fault, the southern segment of the Xainza-Dinggye rift in the southern Tibetan Plateau. The earthquake produced a ~35km co-seismic surface rupture and caused secondary surface deformation along the eastern shore of Dingmuco, extending ~12km with a width varying between 0.2 and 0.5 km. A series of extensional (tension cracks, half-grabens, grabens) and compressional structures (sporadically distributed sand liquefaction features, pressure ridges, compressional bulges, and fold scarps), all parallel to the lakeshore and nearly N-S trending, develop progressively from east to west. These structures formed mainly within the poorly consolidated sandy sediments of the mid-to-lower sections of the alluvial fan. Detailed structural analysis reveals that the observed extensional features (e.g., tension cracks and grabens) and compressional features (e.g., compressional ridges and bulges) are not direct products of co-seismic rupture, but rather represent structures resulting from secondary shallow surface collapses induced by the earthquake. This phenomenon results from liquefaction, shear instability, and gravity-driven deformation of loose sediments under seismic loading. The dynamic formation process can be divided into four stages: liquefaction triggered by earthquake, initial instability, sliding deformation, and fluid migration facilitation. These stages collectively demonstrate a typical multi-stage coupling mechanism. During this seismic event, numerous buildings in villages such as Qiangga—located atop the slump mass—collapsed extensively. This destruction likely relates not only to seismic shaking effects in the hanging wall but is also closely associated with vibrations induced by the contemporaneous slumping deformation. Investigating such phenomena holds significant implications for both paleoseismic identification and geohazard assessment.