中国应急管理部国家自然灾害研究所蔡军涛团队报道了三维电阻率结构揭示了1988年澜沧江-耿马地震偶波的级联破裂过程。这一研究成果发表在2025年7月10日出版的《地质学》杂志上。

双重地震——发生在紧密连续的两次大地震——对理解断层相互作用和破裂动力学提出了挑战。

研究组利用三维大地电磁成像技术研究了1988年澜沧江-耿马地震偶波的电阻率结构对地震的影响。电阻率模型显示了一个高电阻率异常（R1），解释为两个震中之间的刚性粗糙体，两侧是导电断裂带（C1和C2）。R1可能是应力聚集带，C1和C2可能是弱断裂段，有利于破裂扩展。

这些电阻率域之间的相互作用控制了级联破裂序列。这些结果强调了金属电非均质性对大板内地震动力学的影响，并为断层相互作用和应力传递提供了新的见解。

附：英文原文

Title: Three-dimensional electrical resistivity structure reveals the cascade rupture process of the 1988 Lancang-Gengma earthquake doublet

Author: Tao Ye, Xiaobin Chen, Qinghua Huang, Shunping Pei, Jiong Zhang, Juntao Cai

Issue&Volume: 2025-07-10

Abstract: Earthquake doublets—two large earthquakes occurring in close succession—pose challenges for understanding fault interaction and rupture dynamics. This study employs three-dimensional magnetotelluric imaging to investigate how crustal resistivity structure influences the 1988 Lancang-Gengma earthquake doublet in southwestern China. The resistivity model reveals a high-resistivity anomaly (R1), interpreted as a rigid asperity between the two epicenters, flanked by conductive fault zones (C1 and C2). R1 likely acted as a stress accumulation zone, while C1 and C2 serve as weakened fault segments that facilitate rupture propagation. The interaction between these contrasting resistivity domains controlled the cascading rupture sequence. These results underscore the influence of crustal electrical heterogeneity on large intraplate earthquake dynamics and offer new insights into fault interaction and stress transfer.

DOI: 10.1130/G53209.1

Source: https://pubs.geoscienceworld.org/gsa/geology/article-abstract/doi/10.1130/G53209.1/659448/Three-dimensional-electrical-resistivity-structureredirectedFrom=fulltext