主成分分析在山西地磁台阵数据分析中的应用

Application of Principal Component Analysis in Shanxi Geomagnetic Observatory

摘要: 选取了布设在山西北部恒山断裂带两侧的5套GM4磁通门磁力仪记录的2015年10月到2016年6月的观测资料，利用主成分分析方法对这些数据进行分析，总结其变化特征。结果显示：第一到第四主成分的贡献率为91%；第一主成分与地磁活动Kp指数为正相关；第二到第五主成分无明显日变特征；第一主成分和其他主成分之间存在相关性，且为负相关。

Abstract: The observation data from October 2015 to June 2016 record by 5 sets of GM4 flux-gate magnetometer on both sides of the Hengshan fault zone in the north of the Shanxi province are study using the Principal Component Analysis (PCA) method. The results show that the contribution of the first to the fourth principal component is about 91%; the first principal component is positively correlated with the Kp index of geomagnetic activity; the second to the fifth principal components has no obvious daily variation characteristics; there is also a negative correlation between the first and other principal components.