By Mario Rana | 2025-02-03
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huge sunspot holding
On 02/03/2025 04:16 pm by Patricio Leon| Santiago, Chile
two days ago sunspot AR3981 was a pair of specks, yesterday it had grown to Earth sized components and today again a three-fold increase so the two big cores are observable with protected eye alone. Besides, it is the only spot in the conglomerate with a delta magnetic component meaning a possibility of producing geoeffective X flares
Newt 4.5" + solar film, 1/640s ISO100
crop, B/C