via the ARRL: The ARRL Solar Report

Solar activity reached moderate levels early this past week with several flares. An X1-class flare erupted mid-week, but activity has slowed down with the majority of the low-level C-class flares. A coronal mass ejection (CME) was observed on May 27 with a flare from Region AR4100.

Modelling determined the CME to be well behind Earth’s orbit. No other potentially Earth-directed CMEs were detected in available coronagraph imagery. M-class flare activity, minor – moderate, is likely, with a slight chance for X-class flare events, strong or greater, through May 30.

The forecast of Solar and Geomagnetic Activity to June 21, 2025:

Solar activity is likely to reach moderate levels (R1-R2/Minor-Moderate), with a chance for R3 (Strong), over the next three days as Region AR4098, the most productive region on the visible disk, makes its way to the west limb of the Sun. A chance for M-class X-ray activity (R1-R2) will persist throughout the outlook period due to multiple regions on the visible as well as multiple active regions scheduled to return from the far side of the Sun.

No proton events are expected at geosynchronous orbit.

The Geomagnetic field activity is expected to be at a mostly elevated level due to anticipated influence from multiple, recurrent coronal holes. G1 (minor) geomagnetic storms are likely on June 13-14; active conditions are likely over June 2, June 5, June 10 and 11, and June 15 to 17.

Unsettled conditions are likely over June 3 and 4, June 6 and 7, and June 18 to 21. Quiet conditions are only expected on June 8 and 9.

On May 30, Spaceweather.com reports on a Super-Fast Solar Wind, and a 24-hour Geomagnetic Storm.

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