Minor C7.2 solar flare erupts at 02:49 UTC on June 8, 2026

A minor C7.2 solar flare erupted at 02:49 UTC on June 8, 2026.

Today’s flare activity includes only C-class events, with no M-class or X-class flares reported. No specific solar flares, including the C7.2 event, are listed in the official event reports for June 8, 2026.

In 24 hours to 00:30 UTC on June 8, solar activity was at low levels, featuring only lower level C-class flare activity. Region 4455 underwent decay and was quiet, region 4456 experienced minor decay and produced a C3.3 flare at 04:19 UTC on June 7, while regions 4462 and 4464 showed growth and produced additional C-class flares. No new Earth-directed coronal mass ejections were observed.

There is a 55% chance for isolated M-class flare activity through June 10 due to flare potential in regions 4456, 4458, and 4462, along with flare history from region 4455.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4455 (N15W75 – Alpha), AR 4456 (N17W48 – Beta-Gamma), AR 4458 (S05W62 – Beta), AR 4459 (N14W18 – Beta), AR 4461 (S21E05 – Beta), AR 4462 (N15E05 – Beta), AR 4463 (N17E37 – Alpha), and AR 4464 (S12E38 – Beta).

Over the past 24 hours, the greater than 2 MeV electron flux at geosynchronous orbit was at high levels with a peak of 2 870 pfu at 15:40 UTC on June 7. The greater than 10 MeV proton flux was slightly enhanced, but well below S1 – Minor radiation storm threshold. The greater than 2 MeV electron flux is expected to return to normal to moderate levels on June 8, then likely increase to high levels by late June 9 and continue through June 10. The greater than 10 MeV proton flux is expected to remain at background levels, with a chance for an S1 – Minor event on June 8 with the arrival of the June 6 CME.

In the past 24 hours, solar wind parameters reflected positive polarity coronal hole high-speed stream influences. The total magnetic field ranged between 4 and 5 nT, with the Bz component fluctuating within ±4 nT. Solar wind speeds peaked at around 589 km/s and gradually declined below 550 km/s. A disturbed and enhanced solar wind environment is anticipated by early to mid UTC-day on June 8 with the shock arrival from the June 6 CME, likely continuing into June 9 and diminishing through June 10.

Over the past 24 hours, geomagnetic field activity was quiet to unsettled. G1 – Minor to G2 – Moderate geomagnetic storms are likely to begin by mid UTC-day on June 8 with the arrival of the June 6 CME. G3 – Strong geomagnetic storming is possible in the latter half of June 8, depending on the CME’s expansion into the Sun-Earth line. G1 to G2 conditions may persist into early June 9 before returning to unsettled to active conditions into June 10.