Minor C9.1 solar flare erupts at 19:58 UTC on June 30, 2026

A minor C9.1 solar flare erupted at 19:58 UTC on June 30, 2026.

Today’s flares include a moderate M1.3 flare from region 4475 at 01:16 UTC and a strong M5.8 flare from the same region at 12:57 UTC. Several minor C-class flares were also recorded throughout the day from regions 4475, 4478, 4479, 4477, and 4480.

In 24 hours to 12:30 UTC on June 30, solar activity reached moderate levels with frequent C-class flares and two M-class flares, including an M1.3 event. Region 4475 exhibited additional spot growth and complex magnetic signatures. Rapid flux emergence and mixed polarity were noted in other regions, but no significant coronal mass ejections have been observed in the latest imagery.

Solar activity is expected to remain at moderate levels through July 2, with a likelihood of isolated M-class flares.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4475 (S09W49 – Beta-Gamma-Delta), AR 4477 (S14W15 – Beta), AR 4478 (S05E08 – Beta-Gamma-Delta), AR 4479 (N16W10 – Beta-Gamma-Delta), and AR 4480 (S18W17 – Beta).

Over the past 24 hours, the greater than 2 MeV electron flux reached high levels with a maximum of 2 637 pfu, while the greater than 10 MeV proton flux remained at background levels. The electron flux is expected to return to normal to moderate levels on June 30, and the proton flux is likely to stay at background values until at least July 1, with a slight chance of an S1 – Minor event on July 2 as active regions rotate into better connectivity with Earth.

Solar wind parameters were mostly ambient, with a weak enhancement observed near 11:10 UTC likely linked to a transient from June 26–27. The interplanetary magnetic field reached up to 9 nT, with the Bz component briefly reaching -5 nT. Solar wind speed ranged between 350 and 450 km/s. Further disturbances from CME passage are expected through June 30 and July 1, waning by July 2.

Geomagnetic field activity was quiet. G1 – Minor geomagnetic storming is likely on June 30, with chances for isolated periods reaching G2 – Moderate levels due to the anticipated arrival of a CME. Unsettled to active conditions may persist into early July before returning to mostly quiet conditions after July 2.