基于Sentinel-1数据的鲜水河断裂带震间形变监测

Interseismic Deformation Monitoring of Xianshuihe Fault Zone Based on Sentinel-1 Data

基于Sentinel-1卫星数据,利用InSAR技术获取鲜水河断裂带2015~2018年的震间形变速率场。研究表明,InSAR结果的可靠性较高,且与GPS监测结果具有很好的一致性。形变速率场显示,鲜水河断裂具有明显的左旋走滑运动特性,断层滑动速率约为7~11mm/a,自北向南存在递减趋势,且在2014-11M6.3康定地震附近,由于受到震后余滑影响,滑动速率达到15mm/a。

In this study,we obtain the interseismic deformation velocity field of Xianshuihe fault from 2015 to 2018 based on Sentinel-1 satellite data by using InSAR technology.Our research shows that the InSAR results are reliable and in good agreement with the GPS monitoring results.The deformation velocity field shows that the Xianshuihe fault has obvious sinistral strike-slip movement characteristics,with a slip rate of about 7-11 mm/a,and shows a decreasing trend from northern to southern segments.What’s more,in the vicinity of the M6.3 Kangding earthquake in 2014-11,the slip rate there reaches 15 mm/a due to the post-earthquake influence.