2021年云南漾濞M_(S)6.4地震GNSS基准站形变分析

Deformation Analysis of GNSS Reference Station for the 2021 Yangbi M_(S)6.4 Earthquake in Yunnan

对2021-05-21云南漾濞M_(S)6.4地震震中附近GNSS基准站地震前后各3 d的观测数据进行处理,研究短时间内地震对基准站稳定性的影响。动态PPP和高精度静态数据处理结果表明,震中附近区域向东南方向发生显著位移,最大站点位移约4.8 cm,整体表现出右旋走滑运动特征。

By processing the observation data of the GNSS reference station near the epicenter of the M_(S)6.4 earthquake in Yangbi,Yunnan on May 21,2021,three days before and after the earthquake,we analyze the impact of the earthquake on the coordinate stability of the reference station in a short period of time.According to the dynamic PPP and high-precision static data processing results,the analysis shows that the area near the epicenter of the Yangbi earthquake have significant displacements towards the southeast,the maximum displacement of the stations is about 4.8 cm,showing the characteristics of right-handed strike slip movement.