卢氏地磁基本站场址勘选及环境测试  

Site Survey and Environmental Test of Lushi Geomagnetic Basic Station

作　　者：谢佳兴 侯博文 刘庆华 路中慧 郅红魁 XIE Jiaxing;HOU Bowen;LIU Qinghua;LU Zhonghui;ZHI Hongkui(Henan Earthquake Agency,Zhengzhou 450018,China)

机构地区：[1]河南省地震局,郑州450018

出　　处：《华南地震》2024年第1期73-83,共11页South China Journal of Seismology

基　　金：中国地震局地震应急青年重点任务(CEA_EDEM-2022);中国地震局监测预报科研三结合课题(3JH-202401091)联合资助。

摘　　要：通过对卢氏徐家湾乡小岭口山洞场址、横涧乡青山村场址、段家村场址进行异地选址踏勘和环境调查,并对徐家湾乡小岭口山洞和段家村场址现场环境进行密跨度和环境噪声测试,结果发现:观测环境噪声对比山洞内比山洞外较好;数据同期对比山洞内存在8.19%的屏蔽效应。综合考虑认为,山洞受本身特殊的封闭环境,状态稳定、干扰源少,环境噪声相比山洞外较优,但对地磁观测存在一定的屏蔽效应,无法更准确的反馈磁场变化,故不适合地磁观测场址要求,最终确定段家村拟选点作为卢氏地磁基本站的最终建设场地。The site selection and environmental investigation of Xiaolingkou Cave site in Xujiawan Township,Qingshan Village site in Hengjian Township and Duanjia Village site were carried out,and the dense span and environmental noise test of Xiaolingkou Cave and Duanjia Village site in Xujiawan Township were carried out.The results show that the observation of environmental noise in the cave is better than that outside the cave;compared with the same period the data,there is 8.19%shielding effect in the cave.It is considered that the cave is in a stable state and has fewer interference sources because of its special closed environment.The environmental noise is better than that outside the cave.However,there is a certain shielding effect on geomagnetic observation,and it is impossible to feedback the magnetic field change more accurately.Therefore,it is not suitable for the requirements of geomagnetic observation site.Finally,the proposed site of Duanjia Village is determined as the final construction site of Lushi geomagnetic basic station.

关 键 词：地磁观测 山洞观测 场址堪选 环境测试 屏蔽效应 

分 类 号：P315.78[天文地球—地震学]