Spectacular show could be seen tonight and Sunday night.
Auroras may dazzle more people than usual this weekend as Earth receives a glancing blow from an enormous solar outburst that erupted on Jan. 19.
The outburst, known as a coronal mass ejection (CME), was detected by sun-watching satellites.
Researchers at the University of Alaska's Geophysical Institute predict that auroras should be visible from Seattle, Des Moines,Chicago, and Cleveland, to Boston and Halifax, Nova ScotiaSaturday and Sunday nights, weather permitting.
A reminder that the sun isn't just a ball of light in the sky, but has the potential to hugely influence our weather and climate.