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After some calm on the Sun occurred new flares of the highest class. Thus, on May 27, recorded flare X-2.9, May 29 – flare X-3.
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Many remember the sensational spot group 3664, which caused a series of magnetic storms and auroras May 10-12. It produced the largest flare since 2017 X-8.7 before retreating to the Sun’s backside on May 14.
Nothing major has happened since then. And now new brightening events. Is 3664 really back?
