琼中地电场观测干扰排查实验分析  

An experimental study on the cause of interference in the observation of the geoelectric field in Qiongzhong

作　　者：郭明瑞[1] 张宇 张兴国 王锡娇[1] 张慧[1] 曾涛 杨世杰 卢启明[1] 庞雪华[1] GUO Mingrui;ZHANG Yu;ZHANG Xingguo;WANG Xijiao;ZHANG Hui;ZENGTao;YANG Shijie;LU Qiming;PANG Xuehua(Hainan Earthquake Agency,Haikou 570203,China;Institute of Earthquake Science,China Earthquake Administration,Beijing 100036,China)

机构地区：[1]海南省地震局,海口570203 [2]中国地震局地震预测研究所,北京100036

出　　处：《地震地磁观测与研究》2024年第5期98-106,共9页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局监测、预报、科研三结合课题(项目编号:3JH-202401013)。

摘　　要：自2014年观测至今,琼中地电场观测数据长期受到干扰,每次干扰时长几小时到十几小时不等,干扰幅度为几十mV/km至几千mV/km,观测曲线形态表现为突跳或台阶,其数据可用性降低。基于此,从自然环境、观测装置、主机、场地环境等方面展开逐一排查,并采用长短极距比值干扰源定位方法,确定引起数据阶变的干扰源,解决台站固定时间段漏电干扰引起数据不能使用的问题,提高数据可靠性。分析结果可为其他台站电磁环境干扰排查提供借鉴。Since the observation in 2014,the observation data of the Qiongzhong geoelectric field has been interfered with for a long time,with the interference duration ranging from several hours to more than ten hours each time,and the interference amplitude ranging from tens of mV/km to thousands of mV/km.The observation curve shows a sudden jump or step.The data availability is reduced.Based on this,the natural environment,observation device,host,site environment,and other aspects are investigated one by one.The method of long and short polar distance ratio interference source positioning is used to determine the interference source causing the data step change,to solve the problem that the data can not be used due to the leakage interference in a fixed period of the station and improve the reliability of the data.The analysis results can provide a reference for the electromagnetic interference investigation of other stations.

关 键 词：大地电场 漏电干扰 干扰源定位 数据质量 台阶 

分 类 号：P315.722[天文地球—地震学]