A powerful Coronal Mass Ejection (CME) struck Earth on June 1, 2025, triggering a geomagnetic storm. NASA and NOAA models accurately predicted the arrival of the CME, which was traveling at speeds exceeding 1000 km/sec and reached Earth around 1:30 AM ET.
SpaceWeatherLive.com reported solar wind speeds peaking at 1002 km/sec. The interplanetary magnetic field (IMF) strength reached 25 nT, with a southward Bz component of -18 nT. These conditions allowed solar wind energy to penetrate Earth's magnetosphere, sparking auroras visible as far south as Alabama and Northern California, according to NOAA's Space Weather Prediction Center (SWPC).
The CME originated from an M8.2 flare from AR14100 on May 31, 2025. Concerns are raised about potential disruptions to power grids, satellites, and radio communications due to the storm. A G4 (Severe) geomagnetic storm watch is in effect for June 2, with the potential for continued geomagnetic activity and enhanced radiation conditions.