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Third Solar Ejection Hits Earth, Triggers Strong Geomagnetic Storm and Widespread Auroras

The strongest flare of 2025 launched the high‑speed cloud now producing some of the decade’s brightest displays.

Overview

  • Russia’s Laboratory of Solar Astronomy at IKI RAN reported the arrival of the third coronal mass ejection, confirming the sequence has reached Earth.
  • The lab said auroras rank among the strongest in a decade, with potential visibility from roughly 45 degrees latitude as the oval extends over Europe and Canada.
  • Monitoring on the lab’s site shows an ongoing geomagnetic storm around G3.3, which corresponds to a strong event.
  • Earlier, satellites at the SunEarth L1 point detected the first CME, and models indicated three impacts increasing in intensity with the final, fastest ejecta posing the greatest risk.
  • Scientists noted high uncertainty in short‑term forecasts and said earlier model timing diverged from observations, including expectations that the fastest cloud could overtake slower ones.