Overview
- An R3 (strong) radio blackout hit the sunlit side of Earth over Europe and Africa after the Nov. 11 eruption from Active Region 4274.
- NOAA models show multiple Earth-directed CMEs from Nov. 9–11 arriving Nov. 11–13 with potential merger into a stronger ‘cannibal’ CME, though exact timing and orientation remain uncertain.
- Proton levels climbed to S2 (moderate), prompting advisories for polar HF radio, satellite single‑event upsets, and slight radiation increases on high‑latitude, high‑altitude flights.
- SWPC’s watch calls for peak G4 conditions Nov. 12, G3 on Nov. 13, and G1 on Nov. 14, with possible power‑grid voltage control issues, GPS and HF degradation, satellite charging, and aurora reaching as far south as Alabama and northern California.
- Region 4274 retains a beta‑gamma‑delta configuration and could still produce additional major flares, with forecasts under active review as new observations refine CME speed and structure.