Moderate M1.0 solar flare erupts at 15:00 UTC on June 20, 2026

A moderate M1.0 solar flare erupted at 15:00 UTC on June 20, 2026.

Today’s flares include a moderate M1.3 flare from region 4472 that began at 01:26 UTC, peaked at 01:51 UTC, and ended at 02:04 UTC; a minor C1.4 flare from region 4470 that began at 02:59 UTC, peaked at 03:07 UTC, and ended at 03:12 UTC; as well as several B-class flares.

In 24 hours to 12:30 UTC on June 20, solar activity reached moderate levels, with the strongest event being an M1.3 flare. A coronal mass ejection associated with this flare is not expected to impact Earth.

Solar activity is expected to continue at low levels from June 20 to June 22, with a slight chance for additional M-class 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, while the greater than 10 MeV proton flux remained at background values. These conditions are expected to persist through June 22.

Solar wind conditions remained mildly enhanced under positive polarity coronal hole high-speed stream influences, with total magnetic field strength reaching 10 nT and wind speeds between approximately 360–460 km/s. Solar wind parameters are expected to remain slightly enhanced through June 21.

The geomagnetic field was at quiet to unsettled levels as influence from the coronal hole high-speed stream waned. Quiet to unsettled levels are expected to continue on June 20 and June 21, with mostly quiet conditions likely on June 22.