Major X4.0 solar flare erupts, producing fast CME and solar radiation storm

"This is the fourth X-class solar flare since November 9, and the sixth since November 4. If we look just at Region 4274, this is its fifth X-class since X1.8 at 17:34 UTC on November 4, X1.7 at 07:35 UTC on November 9, X1.2 at 09:19 UTC on November 10, and X5.1 at 10:04 UTC on November 11.
A Type II Radio Emission, with an estimated velocity of 1 525 km/s, was associated with today’s X4.0 event, suggesting a coronal mass ejection (CME) was produced." W