腾冲中心站地电场观测数据质量及典型干扰分析  

Observation data quality and typical interference analysis of geoelectric field in Tengchong center station

作　　者：番绍辉 邵维晔 熊家伟 张山元 段胜朝 Fan Shaohui;Shao Weiye;Xiong Jiawei;Zhang Shanyuan;Duan Shengchao(Yunnan Earthquake Agency,Yunnan Kunming 650051,China)

机构地区：[1]云南省地震局,云南昆明650051

出　　处：《地震科学进展》2024年第12期851-859,共9页Progress in Earthquake Sciences

基　　金：云南省地震局资助。

摘　　要：通过对腾冲中心站2018—2022年地电场观测资料整理、数据质量及干扰分析,认为腾冲中心站地电场数据在无干扰情况下同测向长短极距相关性较好,日变化清晰,数据可信度较高。其干扰类型大致可以分为自然环境干扰和人工干扰两大类,其中,地电暴、雷电、降雨等干扰属于自然环境干扰,人工源电法供电干扰和场地漏电干扰等属于人工干扰。地电暴引起的干扰变化形态以类似地震波形的大幅度尖锐脉冲突跳为主,雷电引起的干扰变化形态以典型的大幅畸变为主,降雨引起的干扰变化形态以大幅下降为主,同一观测场地中地电阻率供电引起的地电场数据干扰变化以有规律的脉冲突跳为主,路灯漏电引起的干扰变化形态以阶跃型周期变化为主。通过分析不同类型干扰源引起地电场变化形态及物理机制,提出解决干扰的方法,从而提高地电场观测质量,为有效识别地电场干扰和地震预报提供一定的依据。Based on the observation data collation,data quality and interference analysis of the geoelectric field of Tengchong center station from 2018 to 2022,it is considered that the geoelectric field data of Tengchong center station has good correlation with the long and short polar distances in the same direction without interference,with clear diurnal variation and high data reliability.The interference types can be roughly divided into two categories:natural environment interference and artificial interference.Among them,the interference of geoelectric storm,lightning and rainfall belongs to natural environment interference,and the interference of artificial power supply and site leakage belongs to artificial interference.The interference changes caused by geoelectric storm are mainly characterized by large amplitude sharp pulse jumps similar to earthquake waveforms.The interference changes caused by lightning are mainly characterized by typical large amplitude distortions.The interference changes caused by rainfall are mainly characterized by large decreases.The interference changes caused by ground resistivity power supply in the same observation site are mainly characterized by regular pulse jumps.The interference caused by street lamp leakage mainly exhibit a step-type periodic variation change.By analyzing the forms and physical mechanisms of changes in the geoelectric field caused by different types of interference sources,methods to solve the interference are proposed to improve the quality of geoelectric field observation and provide a basis for the effective identification of geoelectric field interference and earthquake prediction.

关 键 词：地电场 干扰类型 物理机制 观测质量 

分 类 号：P315.63[天文地球—地震学]