Abstract: Shouning area in Fujian province is prone to geological hazards, severely affecting the lives and properties of the local residents. In this study, persistent scatterer interferometric synthetic aperture radar (PS-InSAR) technology is applied to process data from 100 ascending orbit Sentinel images covering the study area from January 2018 to May 2020. Deformation information and deformation rate profiles of the study area are obtained, identifying deformation anomalies and confirming 6 deformation targets through field investigations. The results indicate that during the study period, the deformation rate ranged from -16 to 10 mm/a, with cumulative deformation ranging from -54 to 34 mm. The average deformation rate along profiles varied from -10 to 5 mm/a. Overall, the study area's surface remains relatively stable, with deformation possibly occurring in some localized areas. The identified 6 target areas mainly exhibit deformation characteristics such as landslides, unstable slopes, and collapses, with consistent deformation trends in the surrounding areas, generally sinking away from the line of sight. Precipitation emerges as the primary factor influencing deformation. The research findings provide valuable data support and decision-making basis for geological hazard prevention and control in the Shouning area of Fujian province.

Key words: Fujian Shouning, PS-InSAR, deformation information, profile curves, deformation targets