2021年5—11月，河南潢川地震台地电阻率EW测道观测曲线出现较大台阶，而NS测道变化平稳。从自然环境、场地环境、观测系统等方面开展干扰排查，排除了降雨、场地环境的影响。调查发现，EW测道地电阻率观测曲线的台阶、突跳等现象，应为地电架空外线路钢绞线漏电所致。
From May to November, 2021, the EW (East-West) channel of geoelectrical resistivity observation curve at the Huangchuan Seismic Station in Henan Province showed a significant step-like changes, while the NS (North-South) channel remained stable. We carried out interference investigation considering natural and site environments, as well as the observation system, ruling out the influence of rainfall and site environmental factors. It was found that the step-like changes and sudden jumps in the resistivity observation curve of the EW channel should be caused by the leakage from the steel strands of the overhead power lines used in the geoelectrical measurement setup.
2024,45(1): 63-68 收稿日期：2023-10-27
DOI：10.3969/j.issn.1003-3246.2024.01.009
基金项目：中央公益性科研院所基本科研业务专项（项目编号：IGCEA1902）；河南省地震构造探查工程项目
参考文献：
杜学彬. 在地震预报中的两类视电阻率变化[J]. 中国科学:地球科学,2010,40(10):1 321-1 330.
罗娜,宋昭,乔子云,等. 河北大柏舍地电台地电阻率观测数据分析[J]. 山西地震,2017,(2):11-15.
中国地震局. 地震及前兆数字观测技术规范[M]. 北京:地震出版社,2001.
王燚坤,隆爱军,黄显良,等. 安徽省地电阻率观测干扰因素的分析研究[J]. 防灾科技学院学报,2011,13(4):52-56.
严玲琴,郑卫平,张辉,等. 临夏台地电阻率变化与震兆现象分析[J]. 中国地震,2013,29(1):168-176.
中国地震局. DB/T 18.1-2006地震台站建设规范地电观测台站第1部分:地电阻率台站[S]. 北京:地震出版社,2006.
