重庆红池坝地电场变化分析

Analysis of Geoelectric Field Changes in Hongchiba,Chongqing

利用磁静日时序叠加方法和FFT频谱分析方法对红池坝地电场观测资料进行逐月处理,并与巫山建坪台地磁观测资料进行对比,分析红池坝地电场静日变化特征;计算红池坝台站磁暴期间产生的感应电场,与地电场观测数据对比,分析地电暴的特征。结果表明,静日随着月份的变化,相位发生变化,与巫山建坪地磁Sq变化一致;1月、2月、11月、12月的地电场日变幅明显小于其他月份;地电场显著周期成分与磁静日地磁场相同,并且通过周期成分的逐月对比分析得到,地电场与地磁D分量的不同周期成分的频谱值随时间的变化基本一致;某一方向的地电暴与该垂直方向的磁暴和该地区的电性结构有关;地电暴观测值与地磁感应电流计算值呈线性关系;地电暴变化与K值呈指数关系。

We use static daily superposition and the FFT spectrum analysis method to analyze month by month observation data from the Hongchiba geoelectric field,and compare the results with the Wushan establishment of geomagnetic observation data.We calculate the induced electric field in Hongchiba site during the storm,contrast this with observed data,and analyze the characteristics of the geoelectric storm.The results show that:as the month changes,the phase of static daily curve changes.The diurnal variation of the electric field at 1,2,11,and 12 months is significantly smaller than at the other months.The periodic component of the geoelectric field is the same as the geomagnetic field.Comparison of periodic components shows that the changes of the spectral values of the different periodic components of the geomagnetic field are in agreement with the geomagnetic D components.The geoelectric storm in a certain direction is related to the magnitude of the magnetic storm in the vertical direction;the geoelectric storm in Hongchiba site is related to the electrical structure of the area;there is a linear relationship between the observed geoelectric storm and the calculated value of geomagnetic induced current;and the relationship of geoelectric storm and magnetic index K is index.