Increased solar activity after strongest solar radiation storm since 2006
Growing Sunspot 1402 erupted in morning of January 23, 2012 around 04:00 UTC, producing a long-duration M8.7 solar flare. Each category for x-ray flares (B,C,M,X) has nine subdivisions ranging from C1 to C9, M1 to M9, and X1 to X9. This one ranks M9, which is only
