淮南深地地磁总场连续观测与时变特征  

Continuous observation of geomagnetic total-field at the underground laboratory in Huainan city,China and its time-varying characteristics

作　　者：郭良辉 王博[2] 宋晓林[4] 王赟 金承奕[2] 姚硕[1,2] 史钰峰 GUO LiangHui;WANG Bo;SONG XiaoLin;WANG Yun;JIN ChengYi;YAO Shuo;SHI YuFeng(Key Laboratory of Intraplate Volcanoes and Earthquakes(China University of Geosciences,Beijing),Ministry of Education,Beijing 100083,China;School of Geophysics and Information Technology,China University of Geosciences(Beijing),Beijing 100083,China;State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China;Shandong Institute of Space Electronic Technology,Yantai Shandong 264000,China)

机构地区：[1]陆内火山与地震教育部重点实验室(中国地质大学,北京),北京100083 [2]中国地质大学(北京)地球物理与信息技术学院,北京100083 [3]地质过程与矿产资源国家重点实验室(中国地质大学),北京100083 [4]山东航天电子技术研究所,山东烟台264000

出　　处：《地球物理学报》2024年第2期820-828,共9页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目(U1839208,62127815,42150201,41974101);地质过程与矿产资源国家重点实验室科技部专项经费联合资助.

摘　　要：深地实验室具有电磁干扰小的"超净"地磁观测优势,已成为地磁观测的新平台和研究热点.为了评估淮南深地实验室地磁环境、认识地磁总场时变特征及地下与地面耦合性,我们于2022年在地下巷道(-848 m)和地表(+22 m)同步实施了地磁总场长期连续观测,对观测数据进行了功率谱、小波谱、地磁总场变化特征的分析及与附近的蒙城地磁台比对.研究结果表明:(1)地下无(或弱)磁干扰点位的地磁环境较优越,与蒙城地磁台相媲美,适用于地磁场变化的高精度、长期连续观测;(2)地下地磁观测可有效过滤地表上由工业与人类活动等的电磁干扰,其记录的地磁总场变化与蒙城地磁台具有较好的耦合性;(3)地下磁测可清晰记录地磁总场的平静变化、不同周期磁暴、地磁脉冲等丰富的时变信息,可为地球系统科学研究提供地磁学依据.Underground laboratory has become a new platform and research hotspot for geomagnetic observation due to its advantage of"ultra-clean"geomagnetic background with small electromagnetic interference.In order to evaluate the geomagnetic environment in the underground laboratory in Huainan city,China,and to understand the time-varying characteristics and the coupling between the ground and underground of geomagnetic total-field,we carried out a long-term continuous observation of geomagnetic total-field synchronously in the underground roadway(-848 m)and the surface(+22 m)in 2022.We analyzed the power spectrum,the wavelet spectrum and the variation characteristics of the observed geomagnetic total-field data and compared them with those of the Mengcheng geomagnetic station near Huainan city.The results show that:(1)the geomagnetic environment at underground stations with no(or weak)magnetic interference is clean and is comparable to the Mengcheng geomagnetic station,and thus is suitable for the high-precision,long-term,continuous observation of the geomagnetic field;(2)the underground geomagnetic observation can effectively filter the electromagnetic interference due to industrial and human activities on the ground,and its time variation of geomagnetic total-field is coupled well with that of the Mengcheng geomagnetic station;(3)the underground geomagnetic observation can clearly record the time-varying information of geomagnetic total-field including calm variation,magnetic storms with different periods and geomagnetic pulses,which can provide geomagnetic constraints for studies of earth system science.

关 键 词：深地实验室 地磁总场 时间变化 观测 地磁环境 

分 类 号：P318[天文地球—固体地球物理学]