成都地铁运营对成都地震中心站地磁观测的干扰分析  

Analysis of interference generated by Chengdu metro operation on geomagnetic observation of Chengdu Earthquake Central Station

作　　者：赵乃千 郭宇鑫 廖绍欢 李雪浩[1] ZHAO Naiqian;GUO Yuxin;LIAO Shaohuan;LI Xuehao(Chengdu earthquake monitoring center station of Sichuan Earthquake Agency,Sichuan Province 611730,China;Jiangsu Gaoyou Seismic Station,Jiangsu Province 225600,China)

机构地区：[1]四川省地震局成都地震监测中心站,四川611730 [2]江苏省高邮地震台,江苏225600

出　　处：《地震地磁观测与研究》2023年第1期67-73,共7页Seismological and Geomagnetic Observation and Research

摘　　要：成都地铁六号线——望从祠站与成都地震监测中心站间的直线距离16 km,地铁运行严重干扰地磁观测。分别选取地铁运行、非运行时段成都地震监测中心站磁通门磁力仪观测数据,与距望从祠站34 km、110 km的崇州地震台、江油地震台观测数据进行对比分析,发现成都地震监测中心站地磁观测H分量、D分量受干扰程度大于Z分量,干扰频率集中在0.04 Hz左右。同时,对比3个台地磁观测数据质量,结果表明可对成都地震监测中心站地磁观测数据进行重构。The straight-line distance between Wangcongci station of Chengdu Metro Line 6 and Chengdu Earthquake Monitoring Center Station is 16 km,which seriously interferesthe geomagnetic observation.The observation data of fluxgate magnetometer in Chengdu station during subway operation and non-operation are selected and compared with the observation data of Chongzhou station and Jiangyou station 34 km and 110 km away from Wangcongci station respectively.It is found that the H component and D component of geomagnetic observation in Chengdu station experienced greater interference than the Z component,with the interference frequencys concentrated at about 0.04 Hz.Also,the quality of geomagnetic observation data from three stations was compared,andthe results suggest that the geomagnetic observation data of Chengdu station can be reconstructed.

关 键 词：地磁观测 地铁干扰 数据重构 

分 类 号：P315.721[天文地球—地震学]