Solar activity reaches moderate levels – five M-class flares by 17:00 UTC
Departing Region 2322 produced two M-class solar flares by 12:00 UTC on April 21, 2015. The first one started at 07:08, peaked at 07:20 as M1.1 and ended at 07:27 UTC. Its second M-class flare of the day started at 11:49, peaked at 11:57 as M2.2 (R1 – Minor Radio Blacko
