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目前,世界有191个地磁台(中国大陆地磁台未统计在内),其中给世界地磁资料中心寄送地磁资料的地磁台有141个。从1940年开始工作的地磁台只有76个,其中资料完整可靠且记录时间超过40年的地磁台大约只有40个。国际地磁学和高空物理学协会(IAGA)把世界上的地磁台分为四个等级。各个地磁台所进行的地磁绝对观测,可以使用以下各种不同类型的地磁绝对观测仪:1.用质子旋进矢量磁力仪测磁偏角(D)、水平强度(H)、垂直强度(Z)和总强度(F),
At present, there are 191 geomagnetic stations in the world (geomagnetic units in mainland China are not included), of which there are 141 geomagnetic stations that send geomagnetic data to the World Geomagnetic Data Center. There are only 76 geomagnetic stations that have been in operation since 1940, of which there are only about 40 geomagnetic stations that are complete and reliable and have recorded for more than 40 years. The International Association of Geomagnetism and Upper-Earth Physics (IAGA) divides the earth’s magnetosphere into four levels. The geomagnetic absolute observations made by various geomagnetic stations can use the following different types of geomagnetic absolute observers: 1. Magnetic declination (D), horizontal intensity (H), vertical intensity (Z) And total strength (F),