Abstract:In this study, we use 31 Sentinel-1 images from January 2019 to December 2020 to interpret the current development of Longyao fissures and their impacts on the surrounding areas. Based on SBAS-InSAR and Stacking InSAR techniques, we obtain the time series and rate maps of deformation of Longyao fissures and their surrounding areas, and further study the current slip status of Longyao fissure using the homogeneous elastic space model. The results show that: 1) the stepwise difference of deformation rate between the north and south sides of Longyao ground fissure in 2019 to 2020 is 4 cm/a, which is lower than that of 5 cm/a in 2007 to 2011. 2) There is obvious periodic surface deformation in Guchengdian, Weijiazhuang and Guanzhuang town, but the general trend is still subsidence. 3) The modeling results show that the depth and slip rate of Longyao ground fissure are 0km and 27 mm/a at the present stage. Compared with the results from 2007 to 2011, both depth and slip rate are decreased. It indicates that Longyao ground fissure is still active, but activity has decreased.
FENG Xiaosong,YANG Chengsheng,ZHAO Chaoying et al. Monitoring and Analysis of Fracture and Surrounding Deformation in Longyao, Hebei Province, 2019-2020 Based on Sentinel-1 Image[J]. jgg, 2022, 42(12): 1307-1311.