Coronal mass ejections from the sun are plasma with magnetic fields. They can collide with Earth’s magnetosphere, causing the auroras that fascinate us. This is a well-known phenomenon in the amateur radio community because of the effect on radio propagation.
This month, astronomers told us a geomagnetic storm was coming a few days in advance. It was the biggest since 2005 but was not a remarkable visual display at my location in central Minnesota, some 46 degrees north of the equator.
Read more – RadioWorld: https://bit.ly/3wEBUEn
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