摘要
2021年5月21日云南省漾濞县西侧发生Ms6.4地震,造成较大人员伤亡和经济财产损失。采用D-InSAR技术对云南省漾濞的升降轨Sentinel-1A数据分别进行解算得到Ms6.4地震同震形变场。降轨结果显示在震中的东-南向有两个明显的隆升和沉降区域,雷达视线向最大沉降量为-7 cm,最大隆升量为8 cm。升轨结果显示雷达视线向最大沉降量为-7 cm,最大隆升量为7 cm。根据震源机制解和同震滑动分布模拟计算此次地震导致的周边断裂库仑应力变化情况,联合升降轨结果解算本次地震的垂直向和东-西向形变场,并分别分析形变场的形变方向和形变量级,可以为研究地震震源参数和同震滑动模型精细化反演提供更可靠的约束条件。
On May 21,2021, an Ms6.4 earthquake occurred in the west of Yangbi County, Yunnan Province, causing heavy casualties and economic property losses. In this paper, the coseismic deformation field of Yunnan Yangbi Ms6.4 earthquake is calculated by using the data of ascending and descending sentinel-1A and D-InSAR technology. The descending orbit results show that two obvious uplift and subsidence areas are formed in the southeast of the epicenter. The maximum subsidence in the direction of radar line of sight is-7 cm and the maximum uplift is 8 cm.The results of ascending orbit show that the maximum subsidence in the radar line of sight is-7 cm and the maximum uplift is 7 cm. According to the focal mechanism solution and coseismic slip distribution given by relevant institutions and scholars, the Coulomb stress changes of surrounding faults caused by this earthquake are simulated and calculated. Finally, the vertical and east-west deformation fields of the earthquake are obtained by direct calculation of the combined descending and ascending orbit results and the deformation direction and level of the two deformation fields are analyzed, it can provide better constraints for further source parameters and coseismic sliding model inversion.
作者
潘建平
赵瑞淇
袁雨馨
蔡卓言
付占宝
PAN Jianping;ZHAO Ruiqi;YUAN Yuxin;CAI Zhuoyan;FU Zhanbao(Smart City Institute,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《测绘工程》
2023年第1期30-36,共7页
Engineering of Surveying and Mapping
基金
国家自然科学基金资助项目(41801394)
重庆市规划和自然资源科技项目(KJ-2020042)。
