成都地震台地电场观测干扰因素分析

The Interference Factors Analysis of Geo-electric Field Observation in Chengdu Seismic Fiducial Station

通过对2014年以来的成都地震台地电场观测系统数据进行整理分析,总结了这些观测数据的日变形态和特征,同时对一些影响地电场数据变化的干扰因素进行识别与分析,发现这些干扰主要为供电、地铁运行、雷电、降雨、农田灌溉和高压直流输电等,这些干扰的主要表现形式为台阶、方波型阶跃,高频脉冲、不规则大幅度突跳等。这些认识对于正确识别、排除各类干扰信号并进一步提高观测资料质量具有积极的意义。

This paper gives a brief introduction to the geo-electric field observation system in Chengdu Seismic Fiducial Station. The geo-electric field observed data since 2014 are collated and analyzed. The diurnal variation and characteristics of the observed data are summarized and some interference factors that affect the changes of geo-electric field data are identified also. This work has positive significance to correctly identify and eliminate some kinds of interference signals and improves the quality of observed data.