Major X5.1 solar flare erupts from Region 4274, producing large Earth-directed CME
A major solar flare registered as X5.1 erupted from Active Region 4274 at 10:04 UTC on November 11, 2025. The event started at 09:49 UTC and ended at 10:17 UTC.
Strong geomagnetic storm forecast for November 12, aurora as low as Pennsylvania, Iowa and Oregon
A strong geomagnetic storm is forecast for November 12, 2025, following the expected arrival of two coronal mass ejections (CMEs) from Active Region 4274. The event is likely to reach G3 – Strong or higher levels, making aurora visible as far south as Pennsylvania, Iowa and Oregon.
S1 – Minor Solar Radiation Storm in progress after X1.2 solar flare
Proton flux rose sharply following X1.2 solar flare at 07:19 UTC on November 10, 2025, reaching S1 – Minor Solar Radiation Storm levels at 11:20 UTC.
Major X1.2 solar flare erupts from Region 4274 producing fast CME
Active Region 4274 produced its second X-class solar flare since it emerged from the far side last week, this time peaking as X1.2 at 09:19 UTC on November 10, 2025. This is now the third X-class flare since the November 4 X1.8 and X1.1. A coronal mass ejection (CME) was associated with the latest event and is expected to have an Earth-directed component.
Major X1.7 solar flare erupts from Earth-facing Region 4274, CME impact expected on November 11
A major long-duration solar flare measuring X1.7 erupted from Active Region 4274 at 07:35 UTC on November 9, 2025, producing an assymetric halo CME with impact expected around 12:00 UTC on November 11. The event started at 07:01 and ended at 07:55 UTC.
Earth-directed CME produced by M7.4 solar flare, strong geomagnetic storm forecast
Solar activity reached high levels on November 5, 2025, as Region 4274 (N24E40) produced two powerful M-class flares – an M7.4 at 11:19 UTC and an M8.6 at 22:07 UTC. The full-halo CME from the first event is expected to reach Earth late November 6 to early November 7, likely producing G3 – Strong geomagnetic storm conditions and visible auroras across Canada and the northern United States.
G3 – Strong geomagnetic storm forecast for November 6-7, aurora as low as Pennsylvania to Iowa and Oregon
A G3 – Strong geomagnetic storm is forecast for November 6 and 7, 2025. The disturbance originates from X-class solar flares and associated coronal mass ejections (CMEs) recorded on November 4, combined with a coronal-hole high-speed stream. Aurora is expected to become visible across much of Canada and the northern United States, possibly reaching as far south as Pennsylvania, Iowa, and Oregon.
Solar activity increases to high levels, Earth-directed CMEs possible in days ahead
Two powerful X-class solar flares erupted on November 4, 2025 — an X1.8 from Region 4274 and an X1.1 from a region just beyond the east limb — launching CMEs largely off the solar limb. NOAA forecasts G1 – Minor to G2 – Moderate geomagnetic storming from late November 6 into 7 as Earth may experience a glancing shock from the flares combined with a coronal hole high-speed stream.
Major X1.8 solar flare erupts from Active Region 4274, CME produced
A major solar flare measuring X1.8 erupted from Active Region 4274 at 17:34 UTC on November 4, 2025. The event started at 17:15 and ended at 17:51 UTC. This is the first X-class flare since the impulsive X1.9 from Active Region 4114 at 23:50 UTC on June 19, 2025.
Long-duration M5.0 solar flare erupts from the northeast limb
A long-duration solar flare measuring M5.0 erupted from an active region located at the NE limb of the Sun at 10:11 UTC on November 3, 2025. The event started at 09:38 and ended at 10:37 UTC.
