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Updated: Jan 18, 2026

$Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction$

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Published on: May 20, 2018

Descifrando las perturbaciones de estrés a lo largo del terremoto de Dingri de 2025 M_w 7.1, Xizang Meridional

Zhangfeng Ma¹, Chenglong Li², Hongyu Zeng¹

¹Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore.

Nature communications

|January 16, 2026

Abstract:

The 2025 moment magnitude (M_w) 7.1 Dingri earthquake in Southern Xizang, China, caused severe devastation and exhibited a complex stress evolution. Its northward unilateral rupture along the twisted, west-dipping graben edge generated ~2 MPa of dynamic stress, triggering blind coseismic slip on an east-dipping fault. Coseismic stress perturbations activated over 50 previously unmapped fault segments, mostly with aseismic slip, while also inducing an early viscoelastic response in the weak middle-to-lower crustal layer below ~20 km depth. Here we explain these behaviours by deciphering the stress perturbations through earthquake cycle observations and models. A major implication is that tracking stress evolution throughout an earthquake provides critical insights into earthquake mechanics.

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