吉林地区地电场变化特征分析研究

Analysis of the Characteristics of Geoelctrical Field Changes in the Jilin Region

本文在初步介绍了吉林地区地电场观测台网基本概况的基础上,对该区域记录到的地电场的基本变化特征进行了统计分析。研究表明:①绝大部分台站记录到了比较典型的地电场静日变化,主要表现为"峰—谷—峰"形态,该变化形态在时间上具有同步性;②所有台站均记录到了比较明显的地电暴同步变化,呈近似南北分布的几个台站记录到了微弱磁扰的同步变化;③地电场日变化幅度呈现比较明显的年变化规律,不同台站的地电场日变化幅度具有一定的差异性;④正常工作状态下,各个台站之间同测向观测数据具有比较好的相关性。

In this paper we first introduced the geoelectric field observation network in Jilin region,and then statistically analysed the basic characteristics of the observed geoelectric field changes.The results show that： ① The typical daily variations of geoelectric field are recorded at most of stations as the type of ＂peak-valley-peak＂,and the morphological changes are simultaneous in time;② The obvious simultaneous changes during the electrical storm are recored at all the stations,and the simultaneous changes during weak magnetic disturbance at several stations of approximate north-south distribution;③ It is obvious that the change range of geoelectric field follows a annual change pattern,and the variation ranges differ from each other;④ Under normal state,the results of data correlation in the same direction between stations are good.