【摘要】 以合肥台跨郯庐断裂短水准数据为基础,结合华东地区中强震及安徽地区小震释放能量分析了历史测量资料在地震期间的变化,研究了辅助资料对测量资料的影响,得出:(1)降水虽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的前兆意义。(2)华东地区中强地震、安徽地区小震(群)与合肥台断层形变存在一定的相关性,断层活动连续几个月持续拉张或挤压在近区常有地震(或小震群)对应较好,由于资料对应地震的震中方位的差异,说明资料可以反映区域应力场的变化。3)2006年以来的断层持续东倾反映出所跨断层活动性质由张性转为压性,是可信的趋势性异常。更多还原

【Abstract】 In this paper,the characteristics of fault deformation evolution was analyzed based on the cross-fault leveling data of Hefei Seismic Station during earthquake of its surrounding area,and the cross-fault leveling data influenced by assisting observation data also have been studied.The conclusions are as follows:1) though the rainfall can lead to the fault deformation,the fault deformation anomalies still have precursory significance to some degree when the regional stress have intensity effect on the fault.2) Moderately strong earthquakes in East China and small earthquakes in Anhui area have certain relations with the cross-fault deformation of Hefei Seismic Station.If the fault trend to a direction continues for several months,small earthquakes(or earthquake) of its surrounding area will be enhanced.The data can reflect the change of regional stress field because of differences between data and the epicentrum orientation.3) Eastward tilt reflects the characteristic of fault activity from tension change into compressive since 2006.It can be considered as trusted trend anomaly.更多还原