地球与行星物理论评（中英文）2026，Vol.57Issue(1)：82-94,13.DOI:10.19975/j.dqyxx.2025-009
2008年于田地震前后ENVISAT-1 ASAR观测到的西藏郭扎错断层差异运动
Differential motions of the Gozha Co Fault(Xizang)before and after the 2008 Yutian earthquake revealed by ENVISAT-1 ASAR
摘要
Abstract
Shallow fault creep is a relatively rare phenomenon,often indicating a lower seismic risk(less strain accumulation).Previous studies have revealed shallow creep on the Gozha Co Fault in the western Qinghai-Xizang Plateau using Sentinel-1 and ALOS-2 data,but its formation mechanism remains unclear.Considering the 2008 MS7.3 Yutian earthquake that occurred to its north,which may have influenced the fault's movement,we used time series interferometry to process descending ENVISAT-1 SAR data from 2003 to 2010.This allowed us to obtain the line-of-sight deformation field before and after the 2008 Yutian earthquake.The results show that the Gozha Co Fault did not exhibit significant differential motion before the 2008 Yutian earthquake,while the fault moved left-laterally after the event.Therefore,we propose that the shallow creep on the Gozha Co Fault may have been triggered by the 2008 MS7.3 Yutian earthquake.This work is helpful for analyzing the physical mechanisms of fault shallow creep and earthquake potential in the western Qinghai-Xizang Plateau.关键词
郭扎错断层/浅部蠕滑/ENVISAT-1/滑动速率/2008于田地震Key words
Gozha Co Fault/shallow creep/ENVISAT-1/slip rate/2008 Yutian earthquake分类
天文与地球科学引用本文复制引用
甘茂,田云锋,罗毅,姜文亮..2008年于田地震前后ENVISAT-1 ASAR观测到的西藏郭扎错断层差异运动[J].地球与行星物理论评（中英文）,2026,57(1):82-94,13.基金项目
应急管理部国家自然灾害防治研究院基本科研业务专项(ZDJ2018-13) （ZDJ2018-13）
国家自然科学基金资助项目(41972230,42271015)Supported by the Basic Research Program of National Institute of Natural Hazards,Ministry of Emergency Management of China(Grant No.ZDJ2018-13)and National Natural Science Foundation of China(Grant Nos.41972230,42271015) （41972230,42271015）
