Overview
- NOAA’s Space Weather Prediction Center issued a G4 severe geomagnetic storm alert for Tuesday and Wednesday, with elevated conditions likely to persist into the next 24–72 hours.
- Auroras were reported at unusually low latitudes, including across at least 21 U.S. states such as Florida and Texas, and in Mexico, Chile and Argentina.
- Forecasters said two CMEs have already struck Earth and a third, potentially stronger arrival was expected around midday Wednesday, with impacts hinging on the magnetic orientation on arrival.
- NOAA reported some transient effects on GPS and electrical systems, and operators of power grids, satellites and communications networks were urged to implement mitigation protocols.
- UNAM/SCIESMEX, NASA and NOAA continue real‑time monitoring and stress that forecast confidence improves only with near‑Earth solar‑wind measurements.