ARRL Solar Update (opens in new tab)

Solar activity continued at low levels during the past 24 hours withfour active regions on the visible disk. The largest events were aC1.0 on May 20 from the northeast limb and a C1.0/Sf, also on May 20,from Region 4439 that was accompanied by Type-III radio sweeps. Thisregion was responsible for the majority of the period’s activity,which otherwise included a B8.7 flare on May 20 from Region 4...