更换仪器和测量电极对成都地震监测中心站地电场观测的影响分析  

Analysis of the Influence on Replacing Instrument and Measuring Electrodes on the Geo-electric Field Observations at the Chengdu Earthquake Monitoring Central Station

作　　者：李雪浩[1] 李国超 何思源 龚康 赵乃千 LI Xuehao;LI Guochao;HE Siyuan;GONG Kang;ZHAO Naiqian(Chengdu Earthquake Monitoring Central Station of Sichuan Earthquake Agency,Sichuan Chengdu 611730,China)

机构地区：[1]四川省地震局成都地震监测中心站,四川成都611730

出　　处：《四川地震》2025年第2期20-26,共7页Earthquake Research in Sichuan

基　　金：中国地震局监测、预报、科研三结合课题(3JH-202401089)。

摘　　要：对比成都中心站更换地电场观测仪器前后和更换测量电极前后的观测数据,分别从仪器特性、数据内在质量和优势方位角进行分析,以此探讨更换仪器和测量电极对地电场观测的影响。结果表明:DCY-Ⅰ地电场仪能极大改善因观测仪器复位重启造成的数据“漏采”情况,提高观测数据的连续率;在超出不极化电极使用寿命后,更换地电场测量电极可大幅提高成都中心站地电场NS、EW和NW三个测向长、短极距观测数据的相关系数并降低差值,显著提升数据内在质量;更换观测仪器和测量电极对成都中心站地电场优势方位角的趋势变化影响不大。通过对比分析,有利于加深对观测系统和观测数据的认识,也能够为其他的地电场观测台站提供参考。Comparing the observation data before and after the replacement of the geo-electric field observation instrument and the replacement of the measuring electrodes at the Chengdu central station,we analyzed the characteristics of the instruments,the intrinsic quality of the data,and the dominant azimuthal angle,with the aim of explo ring the influence on the replacement of the observation instrument and the measuring electrodes on the geo-electric field.The results showed that the DCY-I geo-electric field instrument could greatly improve the data"missing collection"due to the reset and restart of the observation instrument,thereby enhancing the continuity rate of observation data.Moreover,replacing the geo-electric field measuring electrodes beyond the service life could greatly im prove the correlation coefficient of long and short pole distance observation data in the NS,EW,and NW directions at the Chengdu Central Station,which could greatly reduce the difference value and significantly improve the intrinsic quality of the data.In addition,the replacement of observation instruments and measuring electrodes has minimum influence on the trend changes in the dominant azimuthal angle of the geo-electric field at the Chengdu Central Station.Through comparative analysis,our results deepen the understanding of the observation system and observation data,and can also provide insights for other geo-electric field observation stations.

关 键 词：地电场 观测仪器 电极 成都地震监测中心站 

分 类 号：P315.722[天文地球—地震学]