Monster-spot on the Sun "gave out" the most powerful flare for the last 11 years - class X8.7
A gigantic sunspot on the Sun, designated as AR3664, left us a parting gift, but this time without the bonus of the Northern Lights. On May 10, AR3664 produced a class X5.8 flare, and over the past 24 hours flares of X1.7, X1.3, and a colossal X8.7 ...
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