Moderate M1.5 solar flare erupts at 17:08 UTC on November 3, 2025

A moderate M1.5 solar flare erupted at 17:08 UTC on November 3, 2025.

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

In 24 hours to 12:30 UTC on November 3, solar activity reached high levels, driven by two M-class flares, the largest being an M5.0 event. No major X-class flares were detected in this period. Coronal dimming and Castelli-U radio bursts were observed in association with these events. No other Earth-directed CMEs were detected.

Solar activity is expected to be at low levels with an increasing chance for moderate M-class flares through November 4 as Region 4274 rotates further into view. By November 5, moderate M-class flares are likely, with a slight chance for a major X-class 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 was at high levels, peaking at 12 610 pfu, while the greater than 10 MeV proton flux remained near background. The electron flux is expected to remain at moderate to high levels as HSS wanes, and proton flux is forecast to stay near background, with minor enhancements possible through November 5.

Solar wind conditions were enhanced under positive polarity coronal hole high-speed stream influence, with the magnetic field averaging 4–6 nT before rising near 9 nT after 02:00 UTC. Wind speeds decreased from 620 km/s to 430 km/s by the end of the period. Slight enhancements are expected to persist as CH HSS effects slowly diminish, with more ambient-like solar wind returning by November 5.

Geomagnetic field conditions ranged from quiet to unsettled, with isolated active periods during some intervals due to the waning influence of the CH HSS. Isolated G1 – Minor storming is expected through 15:00 UTC on November 3, followed by mostly unsettled to active conditions, then primarily quiet and unsettled levels on November 4 as HSS effects subside.