Surface Deformation Monitoring of Northern Shanxi Area Based on the Technology of PS-InSAR

The major advantage of PS-InSAR is inversion of ground surface slow change for a long time based on high coherent targets. Using 10 single look complex (SLC) RADARSAT-2 wide dates over north of Shanxi fault zone,the ground deformation field during 2011-2014 and ite details were obtained with PS-InSAR method. The results show that:① Between the two fault zones in Dingxiang, the coherence is better, most coherent point targets display lateral slip rate between -5±2 mm/a and -14±2 mm/a in LOS, which shows that this fault are mainly in tensional activities with reverse differential motion characteristics; ② The spatial distribution of subsidence shows that groundwater extraction of industry and daily life are the main reasons, the major subsidence zones, trending NNE, coincide with the orientations of the fault zones, implying subsidence distribution is controlled by the fault; ③ Reliability verification is reasonable between existing GPS and PS point targets, the result is consistency and proved the effectiveness of this method.