Magnetic pole, region at each end of a magnet where the external magnetic field is strongest. A bar magnet suspended in Earth’s magnetic field orients itself in a north–south direction. The north-seeking pole of such a magnet, or any similar pole, is c
Earth’s magnetosphere experiences periodic pole reversals. During a pole reversal, Earth’s magnetic north and south poles swap locations. Sir James Clark Ross first discovered the North Magnetic Pole in northern Canada in 1831. Since 1831, the pole has been moving across the Canadian Arctic towa...
Cooper et al. identified a significant increase in atmospheric radiocarbon during the period of weakening magnetic field strength that preceded polarity reversal. By modeling the consequences of this increase, they found that the geomagnetic field minimum, when Earth’s magnetic field was es...
Pole reversal can be temporary (known as an event) and incomplete (referred to as an excursion). In such case, the magnetic poles move away from the poles and move nearer (or sometimes crossover) the equator, before eventually returning to their original positions. The last temporary reversal...
geomagnetic (redirected fromEarth's magnetic field) Encyclopedia Wikipedia ge·o·mag·ne·tism (jē′ō-măg′nĭ-tĭz′əm) n. 1.The magnetism of the earth. 2.The study of the earth's magnetism. ge′o·mag·net′ic(-nĕt′ĭk)adj. ...
Earth's magnetic field originates in the outer core and extends out into the magnetosphere — a region of space that helps protect Earth from space weather.
Did you know that the Earth’s poles might flip one day, causing compasses to point south instead of north? Scientists have discovered that this pole reversal is a natural part of our planet’s magnetic cycle, which has happened...
An importantcharacteristicof Earth’s magnetic field ispolarity reversal. In this process the direction of the dipole component reverses—i.e., the northmagnetic polebecomes the south magnetic pole and vice versa. From studying the direction of magnetization of many rocks, geologists know that such...
根据第四段“During a pole reversal, Earth’s magnetic north and south poles exchange locations.(在磁极反转期间,地球磁场的北极和南极交换位置)”可知,磁北参与了磁极反转。故选C。(3)题详解: 细节理解题。根据第一段“Scientists know that the internal forces that generate Earth’s magnetic field(磁场)...