我们大家都熟悉磁铁.中国人在十一世纪就发现了它.地球本身也是一个磁铁.有自己的磁北极和磁南极。虽然许多人都写过有关地球磁性的书,但真正精通的人几乎没有。科学家相信地球中心是一块巨大的磁铁,它给出一个稳定的磁场。从地心到地球表面,这个磁场的强度在慢慢减弱,到达地球表面时,它的强度 All of us are familiar with magnets, which the Chinese discovered in the eleventh century, and the Earth itself is a magnet with its own magnetic north and south magnetic poles. Although many people have written books about the Earth’s magnetism, there are few people who are truly masters. Scientists believe Earth Center is a giant magnet that gives a stable magnetic field. From the center of the earth to the surface of the Earth, the intensity of this magnetic field slowly fades to the surface of the earth, and its intensity