Overview
- Two X‑class flares from active region AR 4274 on Nov. 9 (X1.8) and Nov. 10 (X1.2) launched CMEs, with the second moving faster.
- NOAA/SWPC guidance points to a peak overnight Nov. 11–12, with the highest activity around 04:00 CET and Kp possibly at or above 7.
- The event is expected to reach strong G3 levels with a chance of G4 intensity if the CMEs fully merge.
- Experts note the exact fusion timing remains uncertain, so real‑time space‑weather updates are recommended.
- Aurora could extend to mid‑latitudes with potential visibility in northern Italy, while impacts may include satellite anomalies, HF radio disruption and GPS errors, easing toward G1 by Nov. 13.