甘肃省数字化地电场观测常见干扰分析  

Analysis of Common Interference in Digital Geoelectric Field Observation in Gansu Province

作　　者：苏小芸 陈丽君 季婉婧 王文才 胡源 张磊 周卫东 SU Xiaoyun;CHEN Lijun;JI Wanjing;WANG Wencai;HU Yuan;ZHANG Lei;ZHOU Weidong(Gansu Earthquake Agency,Lanzhou,Gansu 730000,China;Gansu Lanzhou Geophysics National Observation and Research Station,Lanzhou,Gansu 730000,China)

机构地区：[1]甘肃省地震局,甘肃兰州730000 [2]甘肃兰州地球物理国家野外科学观测研究站,甘肃兰州730000

出　　处：《山西地震》2025年第1期7-12,共6页Earthquake Research in Shanxi

基　　金：甘肃省地震局地震科技发展基金(2023YW01、2024YW02);甘肃省科技计划基金项目(23JRRA1397、20JR10RA503)。

摘　　要：运用甘肃省地电场观测数据跟踪分析结果,从观测系统、自然环境、场地环境等方面分析不同干扰类型对地电场观测数据的影响。结果表明,观测系统故障一般较容易识别,主要为多个测项同步错误或缺测;自然环境事件影响多为降雨和雷电影响,其中雷电影响多呈现瞬时、无规则的大幅畸变,降雨常会引起数据趋势改变;高压直流输电造成受影响台站同步出现阶跃方波或尖峰突跳等;人为干扰易造成断记及突跳或台阶,幅度变化为正常观测值的数倍且呈直线下降或上升,不同于雷电引起的无规则突跳;受观测场地地理位置及观测条件不同的影响,地电暴引起的数据变化形态相似但幅度略有差异。Using the tracking and analysis results of geoelectric field observation data in Gansu Province,this paper analyzes the impact of different interference types on geoelectric field observation data from the aspects of observation system,natural environment,and site environment.The results indicate that faults in observation systems are generally easier to identify,often due to synchronization errors or missing measurements among multiple measurement items.The impact of natural environmental events is mostly caused by rainfall and lightning,among which lightning effects often exhibit instantaneous and irregular large distortions,and rainfall often causes changes in data trends.High voltage direct current transmission causes synchronous occurrence of step square waves or sharp jumps at affected stations.Human interference can easily cause interruptions,sudden jumps,or steps,with amplitude changes several times the normal observation value and a linear decrease or increase,unlike irregular jumps caused by lightning.Due to the different geographical locations and observation conditions of observation sites,the data changes caused by geomagnetic storms have similar shapes but slightly different amplitudes.

关 键 词：地电场观测 干扰分析 数据变化形态 

分 类 号：P315.722[天文地球—地震学]