Major X1.1 solar flare erupts at 22:01 UTC on November 4, 2025

A major X1.1 solar flare erupted at 22:01 UTC on November 4, 2025.

Today’s flares include an X1.8 flare at 17:34 UTC from region 4274, an M3.5 flare at 01:48 UTC from region 4274, and numerous C-class flares including C3.4, C2.6, C1.9, C2.4, C2.9, and C2.0 throughout the day. No X1.1 flare was reported in today’s official event listings.

In 24 hours to 12:30 UTC on November 4, solar activity reached moderate levels. Region 4274 produced three M-class flares, the largest being an M3.5 at 01:48 UTC. Moderate growth was observed in region 4274, and slight growth in regions 4273 and 4275. The rest of the spot groups remained relatively stable. No Earth-directed CMEs were observed during the reporting period.

Flare probabilities have increased to 60% for M-class flares and 10% for X-class flares due to the continued complexity and activity of region 4274.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4267 (N01W79 – Alpha), AR 4272 (N23E48 – Beta), AR 4273 (S12E11 – Beta-Gamma), AR 4274 (N24E63 – Beta-Gamma), and AR 4275 (N07E75 – Beta-Gamma).

Over the past 24 hours, greater than 2 MeV electron flux levels were moderate to high with a peak of 4 940 pfu. Greater than 10 MeV proton flux was at background levels. The elevated electron flux is expected to continue through November 6, with a slight chance for an S1 – Minor solar radiation storm due to flare activity from region 4274.

Solar wind parameters were mildly enhanced but declined, with wind speed decreasing from about 480 km/s to 420 km/s. Total field ranged from 4–9 nT, and the Bz component varied between +5/-7 nT. Conditions are forecast to reflect waning CH HSS influences in the coming days. Enhanced solar wind is expected late November 6 into 7 due to the arrival of a new HSS and CMEs from November 3 activity.

The geomagnetic field was at quiet to active levels over the past 24 hours. Activity is expected to diminish to quiet to unsettled levels through November 5. Enhanced conditions are forecast late November 6 due to CME and HSS arrival, with a G1 – Minor geomagnetic storming Watch issued for November 6.