1. At the Earth's surface, these tempests can be detected by changes in the strength of the Earth's magnetic field. 在地球表面,可以通过改变地球磁场强度来检测这些风暴。
2. Whereas atmospheric storms arise in a matter of hours and last for days, magnetic tempests develop over decades and persist for centuries. 大气风暴出现在几小时内,持续几天,而磁暴形成要几十年,持续几个世纪。
3. The Earth's magnetic field is generated as the molten iron of the Earth's outer core revolves around its solid inner core; when surges in the molten iron occur, magnetic tempests are created. 地球磁场是由地球外核的熔铁围绕固体内核旋转而产生的;当铁水激增,就会发生磁暴。