Moderate M1.3 solar flare erupts at 01:51 UTC on June 20, 2026

A moderate M1.3 solar flare erupted at 01:51 UTC on June 20, 2026.

Today’s flares include no reported X- or M-class solar flares, according to available edited event data for June 20, 2026.

In 24 hours to 00:30 UTC on June 20, solar activity was at low levels. The strongest reported flare was a minor C4.2 event. All active sunspot regions were stable or decaying. A small filament eruption was observed near S20E20, with most ejecta expected to miss Earth.

Solar activity is expected to remain at low levels from June 20–22, with only a slight chance for moderate M-class (R1 – Minor) flares.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4465 (N07W76 – Beta), AR 4470 (N06E28 – Beta), AR 4471 (N18W02 – Beta), and AR 4472 (S13E68 – Alpha).

Over the past 24 hours, the greater than 2 MeV electron flux reached moderate levels and the greater than 10 MeV proton flux remained at background values. Moderate electron flux is expected to continue through June 22. Proton flux is forecast to remain at background levels.

Solar wind parameters were slightly enhanced, with magnetic field strength up to 10 nT, Bz component as low as -7 nT, and speeds from approximately 330 to 460 km/s. These enhanced parameters are likely to persist through June 21 due to coronal hole high speed stream influences.

The geomagnetic field was quiet to unsettled over the past 24 hours. Geomagnetic activity is likely to reach active levels on June 20 due to weak but persistent high speed stream effects, with quieter conditions expected June 21–22 as these influences subside.