地电场日变幅与地电暴分析

The analysis of the geoelectricity daily amplitude and electric storm

利用昌黎台地电场资料分析地电场日变幅季节变化特征,显示有季节效应,EW、SN测向夏季日变幅地震最大,而出现最小值的季节两测向表现不一。分析认为,与地电场观测信号的复杂多样性有关。地电暴可以记录到磁暴急始变幅、初相、主相的变化形态,但由于电场和磁场之间存在一阶差分的关系,并不是所有地电暴都和地磁暴变化一致,甚至有些地电暴没有变化形态,而是出现高频上下起伏的脉冲形式。利用多台地电场资料,对同一个K指数为7的磁暴进行急始变幅、扰动最大变幅分析,结果显示,各台不尽相同,可能与台址介质的电性结构有关。

In this paper, daily geoelectric amplitude recorded in Changli Seismic Station was ana- lyzed. It showes that the daily geoelectric amplitude has season effect, EW and SN ganiome- tries have the maximum daily amplitudes in summer, but the minimum value of EW and SN ganiometries showed difference, the reason was to related to the complicated signal of geo- electicity. The electric storm could recorded the sudden commencement amplitude, initial phase and magnafacies, but none of all the electric storms and geomagnetic storms had the same change, even some electric storms had no change type, it is high frequency pulse mode in electiei storms record, the reason was to be the first order difference. The geomagnetic storm of K= 7 was analyzed in several stations, it is found the sudden commencement ampli- tude, perturbation maximum amplitude had different degree change, probably it is related to the electric property structure of station.