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The October 2024 X9.0 Flare
October 3, 2024Geomagnetic StormKp 9
What happened
The most powerful solar flare of Solar Cycle 25 at the time — an X9.0 event from active region 3842 on October 3, 2024 — followed days later by a series of Earth-directed CMEs that produced a G4 (severe) geomagnetic storm on October 10–11 with aurora visible across much of the continental United States, well below normal auroral latitudes.
Track today's real-time conditions
Year: 2024