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Solar Storm Hits G4 Level, Setting Off A Vibrant Display

One of the most impressive displays of the Northern Lights observed in the past 20 years occurred on October 11 across Montana's Hi-Line. According to the National Oceanic and Atmospheric Administration (NOAA), the aurora borealis spectacle that dazzled many who were fortunate enough to step outside that night was due to a severe geomagnetic storm.

NOAA's webpage issued a "SEVERE Geomagnetic Storm ALERT" on October 10, sharing information about the storm's having strengthened and reached G4 conditions. The alert went on to define a severe geomagnetic storm as "a major disturbance in Earth's ma...

 
 
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