Moderate M2.6 solar flare erupts at 02:46 UTC on June 21, 2026

A moderate M2.6 solar flare erupted at 02:46 UTC on June 21, 2026.

Today’s flares include a C1.1 flare that began at 01:01 UTC, peaked at 01:06 UTC, and ended at 01:14 UTC.

In 24 hours to 00:30 UTC on June 21, solar activity reached moderate levels with M-class and C-class flares observed. The strongest event was an M1.3 flare.

Solar activity is expected to remain at low levels from June 21 to June 23, with a chance for additional M-class flares due to the increased complexity of active regions.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4465 (N08W90 – Beta), AR 4470 (N08E14 – Beta), AR 4471 (N19W17 – Alpha), AR 4472 (S14E54 – Beta), and AR 4473 (S08E69 – Beta).

Over the past 24 hours, the greater than 2 MeV electron flux reached moderate levels, while the greater than 10 MeV proton flux remained at background values. Electron flux is expected to stay at moderate levels and proton flux at background levels through June 23.

Solar wind parameters were mildly enhanced, with total magnetic field strength between 5-7 nT, Bz down to -7 nT, and wind speeds between 360-419 km/s. These are expected to transition to background levels over June 21 and persist through June 23.

The geomagnetic field was at quiet to unsettled levels under waning coronal hole high-speed stream influences. Conditions are expected to continue at quiet to unsettled levels on June 21, with mostly quiet conditions anticipated for June 22-23.