河北广平地震台数字电扰动异常分析

Analysis on the anomaly of digital electric field perturbations at Guangping Seismic Sation, Hebei

自2018年1月11日,河北广平地震台数字电扰动仪Ns、EW测道每日北京时间18时至次日06时出现规律性高值变化。通过观测系统检测、测区环境调查、现场实验分析、周边台站观测对比、其他台干扰形态分析及震例总结等手段,并对各种可能的影响因素进行分析论证,综合分析认为,该变化为干扰的可能性较大,非地震前异常。

The NS and EW track of digital electromagnetic disturbance at Guangping Seismic Station shows high value change in daily Beijing time from 18:00 to 06:00 the next day since January 11,2018 with regularity.Various possible influencing factors are analyzed such as observation system detection,environmental of the survey area,field experimental analysis,observation comparison of peripheral station,summary of earthquake cases in other stations and analysis of disturbance patterns.Comprehensive analysis indicates that the change is more likely interference,rather than precursory anomaly.