Editor's note: This article was updated on Nov. 12 at 11 a.m. after two of the three incoming CMEs hit Earth overnight.
The combined solar outbursts triggered a severe G4 geomagnetic storm, resulting in auroras appearing as far south as Arizona, Mexico, Texas, and Florida.
Conditions have since subsided to G3 (strong) levels, but NOAA predicts that G4 conditions could return tonight following the arrival of the third and strongest CME, which is expected to hit Earth sometime today. Elevated auroral activity is likely to carry over into Thursday (Nov. 13) and Friday (Nov. 14), according to the latest NOAA update.
Three powerful outbursts of solar plasma are barrelling toward Earth, with dazzling auroras possible across the northern half of the United States over the coming nights.
