Sunspot 1890 produced powerful X3.3 and three M-class solar flares
New active region 1890 produced yet another strong impulsive flare. Powerful X3.3 solar flare erupted at 22:12 UTC on November 5, 2013. This sunspot group already produced 2 M-class and dozens of C-class solar flares in the past two days.
A Coronal Mass
