Minor C8.7 solar flare erupts at 23:25 UTC on June 23, 2026

A minor C8.7 solar flare erupted at 23:25 UTC on June 23, 2026.

Today’s flare activity includes several C-class events. These include a flare that began at 07:14 UTC and ended at 07:30 UTC at location N08E20, and another that began at 18:19 UTC and ended at 18:29 UTC at location S11E40 in region 4475.

In 24 hours to 12:30 UTC on June 23, solar activity was at low levels, with the largest event being a C1.5 flare at 04:56 UTC on June 22 from just behind the southeast limb.

Solar activity is expected to remain predominantly at low levels between June 23 and 25, with a chance for moderate, M-class flares primarily due to the flare potential of region 4473 and a region about to rotate onto the eastern limb.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4470 (N07W12 – Beta), AR 4472 (S14E28 – Beta), AR 4473 (S09E40 – Beta-Gamma), AR 4474 (N03W75 – Beta-Gamma), and AR 4475 (S09E51 – Beta-Gamma).

Over the past 24 hours, the greater than 2 MeV electron flux was at normal to moderate levels, and the greater than 10 MeV proton flux remained at background values. This is expected to continue over June 23-25.

Solar wind parameters remained at background levels, with a total magnetic field strength at or below 6 nT and no significant southward Bz periods; average wind speed was around 350 km/s. These conditions are expected to continue through June 23, with enhancement likely on June 24-25 from negative polarity coronal hole high-speed stream influences and a potential minor glancing blow from a coronal mass ejection that departed on June 20.

The geomagnetic field was quiet over the past 24 hours and is expected to remain mostly quiet through June 23. Periods of active conditions are likely June 24-25 due to the anticipated influences of a negative polarity coronal hole high-speed stream and minor CME interactions.