Severe G4 Solar Storm Lights Up Skies: Northern Lights Visible Across U.S., Southern Lights in Australia — Where to Watch Tonight (Nov. 12, 2025)
A G4 “severe” geomagnetic storm hit Earth at 01:20 UTC on Nov. 12, NOAA confirmed, triggering widespread auroras across the U.S. and Australia. The storm, linked to an X5.1 solar flare and multiple CMEs, is expected to persist into tonight. Possible impacts include degraded GPS, radio disruptions, and power grid issues. Aurora sightings stretched from the Mid-Atlantic to the Upper Midwest and as far north as Sydney.