采用克里金插值法分析河北地区地磁场变化特征

摘要

通过克里金插值方法，对河北地区2011—2014年地磁场中总强度F值及垂直分量Z值数据进行计算，分析该区近期地磁场变化特征。结果表明：在地震活动较为平静状态下，河北地区地磁场变化与地理纬度改变具有密切关系，与地理经度变化关系不大；F值与Z值等值线分布与地磁台站分布有关，且随时间增加而增大。%By using the method of Kriging, the paper analyzed and calculated the total intensityF value and vertical componentZ value from the year 2011 to 2014 in Hebei Province, and the authors ifnally got the variable features of geomagnetic ifeld in Hebei area. The results showed that the variation of the geomagnetic background ifeld closely related to the change of geographic latitude and no relationship with the change of geographic longitude; the distribution of isogram of theF andZ values was relation with the distribution of the geomagnetic stations, the values ofF andZ were larger with the time.