Abstract
Small baseline subset interferometric synthetic aperture radar (SBAS-InSAR) technique was used to analyze the surface deformation from 2014 to 2017 at Heifangtai, Yongjing County, Gansu Province, China. The significant subsidence areas were delineated. Five potential landslide sites near the edge of Heifangtai were identified. In comparison of the surface deformation patterns among five sites, site $A$ had the largest deformation value. The deformation might be accelerated after June of 2017. On 1 October 2017, a landslide event happened at site $A$ . Thus, factors closely linked to the event was the magnitude and rate of surface deformation. With the findings coupled with other investigations, one should be able to identify potential landslides using the SBAS-InSAR technique and multi-temporal SAR datasets.
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