Fast CME produced by X1.8 solar flare impacts Earth, producing G4 – Severe geomagnetic storm
Coronal mass ejection (CME) produced by X1.8 solar flare on October 9, 2024, impacted Earth at 15:15 UTC on October 10, at nearly 2.4 million km/h (1.5 million miles per hour), triggering G4 – Severe geomagnetic storm.










