COMPREHENSIVE ANALYSIS OF HUGE LEVELING DEFORMATION ANOMALY AT LINFEN LONGCI SEISMOSTATION
临汾龙祠地震台水准测量巨幅形变异常综合分析

The ground vertical deformation fields during the two times of huge deformation anomaly are figured out by D-InSAR technique,along with the results of high-density electric exploration around No BM3 benchmark,we drew several conclusions.Firstly,the InSAR-derived deformation fields indicate there is no continuous deformation anomaly that is related to the fault strike.In another word,the anomaly only showed in a local small area.The other fact is that the No BM3 benchmark was built on the Holocene secondary loess,with the subsidence velocity of 5.11mm/a which is four times of the No BM4.And the anomaly time is consistent with that of the tomb construction.Secondly,the anomaly at No BM3 benchmark should be related to the newly made tomb.The tomb construction may break the impermeable layer,which created a conduit between ground surface and the deepth.Thus,the No BM3 benchmark showed a rapid subsidence during the irrigation season when the subsurface erosion action made upper soil loose.