河北省大地电场的频谱特征分析

采用最大熵谱（MEM）分析法，计算河北省内昌黎、兴济、新乐、阳原、肥乡、大柏舍6个大地电场台站的数据，结合地磁场数据分析河北省内各台电场数据的谱成分特征。结果表明，河北省各台大地电场周期主要是以12 h半日波成分为主，24 h、8 h周期成分明显；磁暴时其谱值高于静日变化谱值；电场日变化主要周期成分来自外空间电流体系的变化。结果基本揭示了河北省内电场观测的背景谱成分特征，为电场数据在地震预报中的应用提供参考依据。

Analysis of the Spectrum Characteristics of Telluric Electric Field in Hebei Province Area

This paper uses the maximum entropy method (MEM) to analyze geo-electric data of Changli, Xingji, Xinle, Yangyuan, Feixiang, Dabaishe stations in Hebei province, combined with geomagnetism data, to analyze the spectral features of components of the telluric electric field data. Results show that: the telluric electric field period is mainly 12 h semidiurnal wave components, with 24, 8 h periodic components significantly in Hebei province; during magnetic-storms, the spectrum value is higher than in quiet diurnal variation; telluric electric field of diurnal changes of periodic components come from changing current system of outer space. The results reveal the background spectral components of geo-electric field observation in Hebei province, and provide reference for the application of telluric electric data in earthquake prediction.