合肥地震台短水准异常与周边地震活动分析

以合肥地震台跨断层短水准数据,结合地区小震释放能量,分析历史测量资料在地震期间的变化,并研究辅助资料对测量资料的影响,得出:①降水可能造成敏感地块的断层形变异常,但在区域应力作用断层到一定强度时,断层形变异常仍具有一定前兆意义；②安徽地区小震释放能量与合肥地震台断层形变存在一定相关性,断层活动连续几个月持续拉张或挤压,...

Analysis on short range leveling abnormalities in Hefei Seismic Station and earthquake activities of its surrounding area

In this paper, the characteristics of fault deformation evolution was analyzed based on the cross-fault leveling data of Hefei Seismic Station during earthquake occurring in its surrounding area, and the cross-fault leveling data influenced by assist observation data also have been studied. The conclusions are as follows ： 1 ） though the rainfall can lead to the fault deformation, the fault deformation anomaly still have precursory significance in some degree when the regional stress have intensity effect on the fault. 2）the release energy of small earthquake of its surrounding area have relations with the cross-fault deformation, if the fault trend to a direction for several months, small earthquakes （or earthquake） activity in its surrounding area will be enhance. The data can refleet the regulation of regional stress field because of difference between data and the epieentral azimuth.