山东地区地磁背景场的变化特征  

VARIABLE FEATURES OF GEOMAGNETIC BACKGROUND FIELD IN SHANDONG PROVINCE

作　　者：薛革[1] 陶九庆[1] 张继红[1] 

机构地区：[1]山东省地震局

出　　处：《高原地震》1995年第4期50-55,共6页Plateau Earthquake Research

摘　　要：本文利用按距离加权最小二乘曲面拟合的方法，对山东地区近期地磁场中总强度Ｆ值及垂直分量Ｚ值的观测资料进行了计算及分析，得到了山东地区地磁背景场近期的变化特征。结果表明：山东地区地磁背景场在地震活动平静状态下其变化特征与地理纬度的改变密切相关，而与地理经度的改变关系不大；Ｆ值或Ｚ值等值线的分布与地磁台分布状况有关，Ｆ值和Ｚ值随时间的增加而增大。By using the method of weighted least-squares curved surface fit with distance,the paper wasanalysed and calculated the total intensity F value and vertical component Z value in recent geomagnetic field in Shangdong province,and the authors got the variable features of geomagnetic backgroundfield in Sh&ngdong area.The results Showed that the variation of the geomagnetic background field wasclack relation with thg change.of geographic 18titde and no retation with the change of geographic longitude i the distribution Of iSopram of the F Z values was relation with the distribution of the geomagneticsautions,F Z values were larger with the time.

关 键 词：山东 地磁背景场 按距离加权最小二乘曲面拟合 等值线 

分 类 号：P56[天文地球—构造地质学]