GEOMAGNETIC STORM WATCH (G3): A CME hurled into space by yesterday's fusillade of X-flares will strike Earth early next week, probably on June 4th. Its impact could spark a strong G3-class geomagnetic storm with auroras at mid-latitudes. CME impact alerts: SMS Text

X-FLARE AFTER X-FLARE AFTER X-FLARE: Exploding like popcorn, sunspot AR3664 (a.k.a. AR3697) produced three X-flares on May 31st and June 1st. The third, a long-duration X1-class event, hurled a halo CME almost directly toward Earth.

https://spaceweather.com/