Moderate M3.0 solar flare erupts at 19:20 UTC on September 2, 2026

A moderate M3.0 solar flare erupted at 19:20 UTC on September 2, 2026.

Today’s flares include a B6.1 event peaking at 01:39 UTC, and a C1.2 event peaking at 13:21 UTC. No M-class or X-class flares are listed for this date based on available edited event data.

In 24 hours to 12:30 UTC on September 2, solar activity was at low levels. The largest event was a minor C5.7 flare that peaked at 21:10 UTC on September 1.

Solar activity is likely to remain at low levels, with isolated to occasional C-class activity and a slight chance for M-class flares through September 4.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4513 (N05W0 – Beta), AR 4520 (S12W20 – Beta), AR 4521 (N09E53 – Alpha), AR 4522 (N13W27 – Beta), and AR 4523 (N10E63 – Alpha).

Over the past 24 hours, greater than 2 MeV electron flux reached high levels with a peak of 2 320 pfu observed at 16:20 UTC on September 1. Greater than 10 MeV proton flux was at background levels. The electron flux is expected to remain high through September 3 before decreasing to normal to moderate values on September 4. Proton flux is forecast to remain at background levels through September 4.

Solar wind parameters were at nominal levels during the period, with total magnetic field strength peaking at 6 nT and Bz ranging from 5 nT to -5 nT. Solar wind speeds averaged just below 400 km/s. The phi angle was predominantly positive. Conditions are expected to remain at ambient-like levels through September 4.

The geomagnetic field was quiet to unsettled for the period. Mostly quiet levels are expected to prevail through September 4.