#X-CLASS SOLAR FLARE: An X2.8-class #solarflare exploded from the farside of the sun today, just beyond the #sun's southeastern limb. It may be old #sunspot AR3664, the source of the May 10th superstorm, still active as it turns to face Earth again later this week
X-ray Solar Flares
6-hr max: M1 0920 UT May27
24-hr: X2 0708 UT May27
https://spaceweather.com/