Along‐Strike Variation of the Unilateral Rupture of the 2025 <i>M</i> <sub>w</sub> 7.1 Dingri, Xizang Earthquake: One of the Shallowest M7+ Normal‐Faulting Events on the Tibetan Plateau
Abstract The 2025 M w 7.1 Dingri earthquake, one of the shallowest documented M7+ normal‐faulting earthquakes on the Tibetan Plateau since 1900, exhibited a complex rupture process investigated through source inversion techniques and multi‐data integration, including near‐field strong‐motion recordings, regional broadband waveforms, teleseismic body and surface waves, and InSAR observations. The centroid depth (∼4.8 km) was robustly constrained by seismic and geodetic data. The three‐segment fault model indicates a dominant northward‐propagating rupture with two high‐slip asperities peaking at ∼4 m. The 24‐s rupture involved primarily Faults 1 and 2, with a strike change from N190°E to N150°E and dip angles of 35°–50°. Normal‐faulting dominated above 10 km depth, generating discontinuous surface fractures with vertical offsets up to 2.3 m. This earthquake likely released east‐west extensional stress resulting from the Indo‐Eurasian plate collision. A 14‐km‐long shallow slip deficit segment near Dengme Co was identified, warranting enhanced monitoring for improved seismic hazard assessment.
Authors
- Zhuowei Xiao (ORCID: https://orcid.org/0000-0001-9575-9375)
- Wei Wang (ORCID: https://orcid.org/0000-0002-5934-4268)
- Juan Li (ORCID: https://orcid.org/0000-0001-5480-7641)
- Xu Zhao (ORCID: https://orcid.org/0000-0001-6151-4302)
Institutions
- Chinese Academy of Sciences (CN)
- Institute of Geology and Geophysics (AZ)
- Institute of Geology and Geophysics (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Geophysical Research Letters
- Published
- 2025-12-06
- DOI
- https://doi.org/10.1029/2025gl119397
- Citations
- 1
- Primary Topic
- earthquake and tectonic studies
- Type
- article
- Field-Weighted Citation Impact
- 1.87