引言北磁极位于地磁场竖直向下的地球表面。虽然地核通过内部对流的地球发电机过程维持了地球的主磁场,但却引起了北磁极随时间的不断漂移。北磁极的漂移速度从20世纪90年代初的15km/a突然增加到90年代末的55km/a。由于此前150多年里观测到的北磁极漂移速度不超过15km/a,所以漂移的加速引起了大家的广泛关注。 Introduction The North Pole is located on the Earth’s surface with the Earth’s magnetic field vertically downwards. Although the earth’s core maintains its earth’s main magnetic field through internal convection of the earth generator process, it causes the North Pole to drift over time. The North Pole’s drift rate suddenly increased from 15km / a in the early 1990s to 55km / a in the late 1990s. Since the North Pole drift rate observed in more than 150 years has not exceeded 15km / a, the acceleration of drift has drawn much attention.