1·Geomagnetic activity, the natural variations in Earth's magnetic field, it fluctuates in 11-year cycles.
地磁活动是地球磁场的自然变化，其波动周期为11年。
2·Additionally, it's also true that geomagnetic "storms" caused by solar activity can disrupt some radio communications, endanger satellites and even knock out power systems.
此外，由太阳活动引起的“地磁风暴”，确实可以破坏一些无线电通信，危害卫星，甚至瘫痪电力系统。
3·Oh yes, and there's geomagnetic reversal.
噢对了。还有地磁反转呢。
4·This striking aurora image was taken during a geomagnetic storm that was most likely caused by a coronal mass ejection from the Sun on May 24, 2010.
这张惊人的极光图片在一场极有可能由2010年5月24日来自太阳的日冕物质抛射引起的地磁风暴期间拍摄的。
5·The plan, methods and principle of azimuth survey was introduced for Urumqi geomagnetic station marker.
介绍了乌鲁木齐地磁台测量标志方位角的方案、测量方法、原理。