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Auroras Sweep the U.S. After G4 Storm as Forecasters Watch for More Activity Into Thursday

Forecasts point to lingering geomagnetic activity into Thursday with continued risk to satellites, GPS and power grids.

Overview

  • NOAA’s Space Weather Prediction Center confirmed the event peaked at G4 (Severe) earlier this week, with G1–G3 conditions lingering and a chance of renewed strengthening into Thursday.
  • A third coronal mass ejection was expected to reach Earth late Wednesday into Thursday, with officials stressing uncertain timing and potential variability in intensity.
  • The storm drove unusually low‑latitude auroras, with verified sightings from the Midwest and Northeast to California, Texas and Florida, and reports as far south as Mexico.
  • Space operations adjusted to the disturbance, including Blue Origin postponing its New Glenn launch and a UC Berkeley Mars satellite launch delay linked in part to the storm.
  • Forecasters warned of possible disruptions to satellites, GPS and HF radio, while advising skywatchers to seek dark, north‑facing views late evening to early morning and use long‑exposure or smartphone night modes.