Moderate M1.0 solar flare erupts at 02:43 UTC on July 27, 2026

A moderate M1.0 solar flare erupted at 02:43 UTC on July 27, 2026.

Today’s flares include an impulsive M3.2 flare, which peaked at 15:28 UTC on July 26, 2026. No other solar flares for July 27, 2026 are currently listed in available event reports.

In 24 hours to 00:30 UTC on July 27, solar activity reached moderate levels, highlighted by an impulsive M3.2 flare. No accompanying coronal mass ejection was observed, and only minor region changes and a few low-level C-class flares were reported.

Solar activity is expected to remain low, with a strong chance for M-class (R1 – Minor to R2 – Moderate) flares through July 29, 2026.

Active sunspot regions presently observed on the Earth-facing solar disk include AR 4489 (S08W0 – Alpha), AR 4492 (N16W21 – Beta), AR 4493 (N05W73 – Beta-Gamma), AR 4494 (S04W02 – Beta-Delta), AR 4495 (S02W13 – Beta), AR 4496 (N05E33 – Beta), and AR 4497 (S20W20 – Beta).

Over the past 24 hours, the greater than 2 MeV electron flux reached high levels, peaking at 1 159 pfu. The greater than 10 MeV proton flux remained at background values. High electron flux is likely to continue on July 27, with moderate levels anticipated for July 28-29. Proton flux is expected to remain at background levels.

Solar wind parameters trended toward background levels, with field strengths averaging 2–5 nT, the Bz component varying between +/-4 nT, and solar wind speeds decreasing from 520 km/s to 440 km/s. Near-background solar wind conditions are forecast through most of July 27; late-period enhancements are likely as a weak CME influence is expected. Effects should persist into July 28 before tapering off by July 29.

The geomagnetic field was quiet over the reporting period. Mostly quiet conditions are expected into the first half of July 27, with weak CME effects possibly bringing active intervals and a chance for G1 – Minor storm levels late on July 27 into July 28. Conditions are forecast to return to quiet to unsettled levels by July 29 as CME effects subside.