密集台阵磁力仪Z分量产出数据的质量分析  

Quality analysis of the Z-component data produced by dense magnetometer arrays

作　　者：黄家亮 滕云田[2] 朱传东 生迪迪 Huang Jialiang;Teng Yuntian;Zhu Chuandong;Sheng Didi(The First Monitoring and Application Center,China Earthquake Administrtion,Tianjin 300180,China;Institute of Geophysics,China Earthquake Administrtion,Beijing 100081,China)

机构地区：[1]中国地震局第一监测中心,天津300180 [2]中国地震局地球物理研究所,北京100081

出　　处：《地震科学进展》2024年第11期795-803,共9页Progress in Earthquake Sciences

基　　金：中国地震局第一监测中心科技创新主任基金(FMC202313,FMC2022001,FMC202311)资助。

摘　　要：应用国家重点研发计划项目“新型便携式地震监测设备研发”在云南南部小江断裂带南段(玉溪和红河州地区)建设的密集台阵磁力仪观测资料,采用经验模态分解(EMD)方法,对Z分量产出数据进行质量分析。研究结果表明,不同站点间的地磁Z分量日变同步差值标准方差稳定在0.86~1.17 nT之间,磁静扰日的相关系数高达0.9720~1,表明了日变形态、日变幅值以及磁静扰日之间均具有较好的一致性特征。研究结果对该地区地磁场变化的时间和空间特征具有一定的参考意义。This paper utilized data acquired from the dense magnetometer array established as part of the National Key Research and Development Program project titled“Development of new portable seismic monitoring devices”in the southern segment of the Xiaojiang fault zone(Yuxi and Honghe regions of southern Yunnan).Employing the Empirical Mode Decomposition(EMD)method,a quality analysis was performed on the Z-component data outputs.The results indicate that the standard deviation of the synchronous differences in diurnal variations of the geomagnetic Z-component across various stations stabilizes within the range of 0.86 nT to 1.17 nT,with correlation coefficients for magnetically quiet days achieving notably high values between 0.9720 and 1.This highlights favorable consistency in the diurnal variation patterns,amplitudes,and conditions during quiet days.The outcomes of this study contribute significant insights into the temporal and spatial characteristics of geomagnetic field variations in the region,offering valuable references for comprehending local geophysical phenomena and potential seismic activities.

关 键 词：密集地磁台阵 磁力仪 Z分量 质量分析 日变形态 

分 类 号：P315.6[天文地球—地震学]