成都理工大学学报（自然科学版）2025，Vol.52Issue(4)：212-222,11.DOI:10.12474/cdlgzrkx.2025011903
2025年1月7日西藏定日MS6.8级强震地表同震形变特征与房屋建筑震损分析
Coseismic deformation and seismic damage assessment of buildings from the MS 6.8 earthquake in Dingri,Xizang,on January 7,2025
摘要
Abstract
On January 7,2025,an MS 6.8 earthquake struck Dingri County,Shigatse City,Xizang Autonomous Region,causing widespread building damage and casualties.This study integrates satellite radar imagery from multiple domestic and international sources to derive the surface deformation field of the Dingri earthquake.The results indicate that the earthquake was triggered by coseismic normal faulting along the seismogenic Dengmo Cuo fault,with a rupture length exceeding 45 km.The main surface deformation was concentrated on the western flank of the fault,with a maximum displacement of 2.1 m.InSAR coherence,pre-and post-earthquake radar backscatter coefficients,and field surveys were comprehensively utilized to assess building damage in the affected region.The analysis reveals that the house collapse rate decreases with increasing distance from the fault.The northwest lake shore region of Dengmo Cuo,including Changshuo township and nearby villages,suffered the most severe damage,with the house collapse rate exceeding 75%in some areas.In contrast,regions near the epicenter,such as Chaji village,experienced relatively minor damage,suggesting smaller coseismic fault displacement in the source region.Field investigations further confirmed the absence of significant surface rupture near the epicenter.关键词
定日MS6.8级强震/InSAR同震形变/同震断层破裂/房屋建筑震损分析/地震野外调查Key words
Dingri MS 6.8 earthquake/coseismic InSAR deformation/coseismic fault rupture/seismic damage assessment/earthquake field investigation分类
测绘与仪器引用本文复制引用
谭莎莎,杨莹辉,许强,王运生,赵伟华,罗永红,陈强,吉锋..2025年1月7日西藏定日MS6.8级强震地表同震形变特征与房屋建筑震损分析[J].成都理工大学学报（自然科学版）,2025,52(4):212-222,11.基金项目
国家社会科学基金重大项目(24&ZD164). （24&ZD164）
