EARTHQUAKE DINGGYE 07.01.2025 AT THE SOUTHERN TIBETAN PLATEAU: EXTENSION IN THE CONTINENTAL COLLISION ZONE

Radar images from the Sentinel-1A satellite have been used to determine the displacement field in the focal area of the January 7, 2025 earthquake in the south of the Tibetan Plateau. A rupture surface model has been constructed, revealing that the earthquake occurred along one of the branches of the rift zone – Dinggye-Xainza Rift (DXR), on a fault with a strike of 187° and a dip of 55° towards the west. The maximum displacement reaches 5.1 m, with an average of 3.5 m. The rift zone is located within a sublatitudinal extension zone, north of the Main Himalayan Thrust. Modeling of the January 7, 2025 event is of great interest as it allows for a detailed examination of the focal zone's position, its relationship with regional structures, and the comparison of instrumental and geological estimates of fault displacement rates. In particular, the findings suggest that geological estimates of extension rates along faults, as well as the seismic potential of southern Tibet rift zones, may be underestimated.

satellite radar interferometry, earthquakes, Tibet, rupture surface model, Dinggye