Moderate M1.8 solar flare erupts at 14:01 UTC on June 6, 2026

A moderate M1.8 solar flare erupted at 14:01 UTC on June 6, 2026.

Today’s flares include C2.1 peaked at 03:59 UTC from region 4456, C1.7 peaked at 04:16 UTC from region 4455, and C3.1 peaked at 06:30 UTC from region 4456. No M-class or X-class flares were listed among the confirmed events for this reporting period.

In 24 hours to 12:30 UTC on June 6, solar activity remained at low levels with isolated C-class flare activity. The strongest event was a C4.7 flare. Several active regions exhibited spot growth or decay, and a new region was numbered. No Earth-directed CMEs were observed.

There is a 50% chance for isolated M-class flare activity through June 8 while overall solar activity is expected to remain at low levels.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4446 (S14W0 – Beta), AR 4455 (N15W48 – Beta), AR 4456 (N18W21 – Beta-Gamma), AR 4457 (S09W87 – Beta), AR 4458 (S05W35 – Beta-Delta), AR 4459 (N14E08 – Beta), AR 4460 (S22W0 – Beta), AR 4461 (S21E31 – Beta), AR 4462 (N17E32 – Beta), and AR 4463 (N16E63 – Alpha).

Over the past 24 hours, the greater than 2 MeV electron flux at geosynchronous orbit was at low to moderate levels while proton flux remained at background. The greater than 2 MeV electron flux is anticipated to rise to high levels on June 6, and remain elevated through June 8. The greater than 10 MeV proton flux is expected to remain at background levels barring a significant new event from active regions 4455 or 4458.

Over the past 24 hours, solar wind parameters reflected CME arrivals from June 3 events. The total field peaked at 20 nT, and Bz reached as low as -17 nT. Solar wind speed increased to between 640–740 km/s. Total field began to settle after about 19:20 UTC on June 5. Another disturbance in the solar wind remains possible for June 6, gradually waning over June 7 and 8 as CME and coronal hole influences diminish.

Over the past 24 hours, the geomagnetic field reached G1 – Minor geomagnetic storm levels, with an isolated bout of G2 – Moderate storming during the 15:00–18:00 UTC period. G1–G2 (Minor-Moderate) geomagnetic storming is expected early on June 6, followed by mostly quiet to unsettled conditions from June 7 as lingering effects subside.