A severe G4 geomagnetic storm hit Earth between 6 AM and 12 PM UTC, potentially disrupting communications, power grids, navigation, and satellite operations. Bright auroras were visible as far south as Kansas and California. The storm, caused by a strong solar flare and coronal mass ejection (CME) from region 4100, is expected to peak again around 6 PM and 3 AM UTC. While the strongest this year, it's less intense than the May 10th G5 storm. NOAA's Space Weather Prediction Center (SWPC) is monitoring the situation.

Prepared by Olivia Bennett and reviewed by editorial team.