Northern lights occur when a solar flare interacts with Earth's atmosphere.
Morning Overview on MSN
The sun just unleashed its biggest solar flare in 30 years and Earth is on alert
The sun has just fired off an eruption so intense it ranks among the most powerful solar flares seen in three decades, a jolt ...
The sun is experiencing a violent solar storm, releasing one of the strongest solar flares seen in the past 30 years ...
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