Major X1.8 solar flare erupts at 17:34 UTC on November 4, 2025
A major X1.8 solar flare erupted at 17:34 UTC on November 4, 2025.
Today’s flares include a strong M3.5 flare from region 4274 peaking at 01:48 UTC, and several C-class flares: C3.4 from region 4274 at 05:28 UTC, C2.1 at 06:19 UTC, C2.6 from region 4275 at 09:02 UTC, C1.9 from region 4273 at 11:14 UTC, C2.4 from region 4274 at 11:48 UTC, and C2.9 from region 4274 at 12:01 UTC. No entry for an X1.8 flare is present in the edited events list as of the latest report.
In 24 hours to 12:30 UTC on November 4, solar activity was at moderate levels, with three M-class flares produced, the largest being an M3.5 at 01:48 UTC. Slight growth was noted in active regions, with no Earth-directed coronal mass ejections observed.
There is a 60% chance for M-class flares and a 10% chance for X-class flares.
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, the greater than 2 MeV electron flux was at moderate to high levels with a peak of 4 940 pfu observed. The greater than 10 MeV proton flux was at background levels. The greater than 2 MeV electron flux is expected to remain at moderate to high levels through November 6. There is a slight chance for an S1 – Minor solar radiation storm in this period.
Solar wind parameters were mildly enhanced but declining, with speeds decreasing from approximately 480 km/s to 420 km/s and total field ranging from 4 to 9 nT. Conditions are expected to remain mild until late November 6 when an increase is likely due to high-speed solar wind stream and CME impacts.
The geomagnetic field was at quiet to active levels in the past 24 hours and is forecast to diminish to quiet to unsettled levels until late November 6. An enhancement is expected late on November 6 due to coronal hole and CME arrivals, with a G1 – Minor geomagnetic storm watch issued for that period.
For detailed, up-to-the-minute conditions, visit our real-time space weather monitoring platform at watchers.news/swx.