感应式磁力仪磁暴数据分析  

Storm different in inductive magnetometer and fluxgate magnetometer

作　　者：张敏[1] 王喜珍[2] 张文来[1] 许秋龙[1] 刘贤伦[1] 杨福喜[1] 

机构地区：[1]新疆地震局,乌鲁木齐830011 [2]中国地震局地球物理研究所,北京10081

出　　处：《地球物理学进展》2014年第4期1966-1972,共7页Progress in Geophysics

摘　　要：本文对子午工程感应式磁力仪(SCM)与传统磁通门磁力仪(GM4)记录的磁暴基本特征进行对比分析,GM4记录的波形不论在磁场平静时还是在磁暴时,各个台站波形相关性很高,GM4记录到完整的磁暴变化形态,SCM记录的磁暴非常规磁暴变化形态.SCM在磁场平静时波形相关性很低,磁暴时各个台站波形相关性很高,可能是由于SCM分辨率较高,磁场平静时记录到更多的台站背景噪声.GM4和SCM磁暴时,Z分量急始方向都向上,且各个台站一致,GM4的H水平分量急始方向向上,而SCM的X分量急始方向朝下,这是因为GM4的H分量探头朝向地磁北极,而SCM探头方向朝向地理北极.磁暴时,GM4的H差分结果与SCM的X分量数据相关性很高,GM4的Z分量与SCM的Z分量差分结果相关性并不高,这可能是因为:(1)磁暴时H水平分量或者X分量表现比较明显,而Z分量虽然有变化,但是变化不如H分量剧烈,(2)GM4的三分量探头集成在一个探头盒中,且有水平泡等保证水平,正交性较好,而SCM的Z分量安装时是安装在一个垂直的坑中,而三分量是否严格正交没有经过检验,可能由于安装方法存在误差,造成GM4的Z分量差分结果与SCM相关性不高.This paper use data from inductive magnetometer in Meridian chain project（called the Meridian Space Weather Monitoring Project）and the usual fluxgate magnetometer,analysis the basic feature difference of magnetic storm.The wave form of GM4 is very relevant in every station both in storm and quiet;wave form of SCM is similar in storm,but different in quiet time,because the resolution of SCM is high,in quite time it record many background noise near stations,GM4 can receive normal storm,But SCM cannot.In storm,the Z component of both SCM and GM4 have an positive pulse in every station.The H component in GM4 have a positive pulse,X component in SCM have a negative pulse,because the probe of GM4 is parallel to Magnetic north,but the probe of SCM is parallel to geographic north pole.In Geomagnetic storms,the correlation between X component of SCM and difference of H component in GM4 is high,Z component in SCM and difference of Z component in GM4 is not high,it may be because：（1）in geomagnetic storm,H or X component and Z component is evident,Z component have changes,but the change is not as the H component violent,（2）three component probe in GM4 is integrated in a probe box,and have a horizontal bubble assurance level,the orthogonal is better, while the Z component of SCM is installed in a vertical hole,and the three component strictly orthogonal is without inspection,may be due to method of installation,caused the correlation between Z component of GM4 difference results and SCM is not high.

关 键 词：感应式磁力仪 磁通门磁力仪 磁暴 

分 类 号：P318[天文地球—固体地球物理学]