Moderate M3.2 solar flare erupts at 12:47 UTC on November 3, 2025

A moderate M3.2 solar flare erupted at 12:47 UTC on November 3, 2025.

Today’s flares include an M1.6 flare peaking at 09:25 UTC from Region 4274 and a strong M5.0 flare peaking at 10:11 UTC, also from Region 4274. Multiple C-class flares were also observed, including a long duration C7.1 from Region 4274 and a C3.0 from Region 4272.

In 24 hours to 12:30 UTC on November 3, solar activity reached high levels following a pair of M-class flares, including a long-duration M5.0 event with an associated Castelli-U radio burst and coronal dimming detected across most SUVI wavelengths. No other Earth-directed CMEs were observed in currently available imagery.

Solar activity is expected to be at low levels with an increasing chance for M-class (R1–R2 – minor to moderate) flares through November 4 as Region 4274 moves further onto the visible disk. By November 5, M-class flares are likely, with a slight chance for an isolated X-class (R3 – strong) flare.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4267 (N02W65 – Beta), AR 4272 (N22E63 – Beta), and AR 4273 (S12E27 – Beta).

Over the past 24 hours, the greater than 2 MeV electron flux reached high levels, with a maximum flux of 12 610 pfu, while the greater than 10 MeV proton flux remained near background levels. The greater than 2 MeV electron flux is expected to remain at moderate to high levels as high speed stream influences wane. The greater than 10 MeV proton flux is expected to stay at background levels, with enhancements possible through November 5 as Region 4274 transits the solar disk.

Solar wind parameters continued to be enhanced under a positive polarity coronal hole high speed stream, with total field averaging 4–6 nT initially, climbing to about 9 nT after 02:00 UTC, and solar wind speeds ranging 450–620 km/s before decreasing to around 430 km/s by the period’s end. Solar wind parameters are forecast to remain slightly enhanced as coronal hole high speed stream influences persist, slowly diminishing to near ambient conditions by November 5 unless any Earth-directed coronal mass ejections arrive.

The geomagnetic field was quiet to unsettled, with isolated active periods during 15:00–18:00 UTC on November 2, 06:00–09:00 UTC and 09:00–12:00 UTC on November 3, likely due to the waning effects of the coronal hole high speed stream. Isolated G1 – Minor storm periods are expected until 15:00 UTC on November 3 as coronal hole high speed stream effects linger. Subsequently, geomagnetic activity is predicted to range from unsettled to active for the rest of November 3, with primarily quiet to unsettled levels on November 4 and mostly quiet conditions expected on November 5.