Over March 14-20, new sunspot groups emerged every day except March19. March 18 had two, and each of the other...
Sunspot Cycle 25
Until March 6, new sunspot groups emerged daily over the past reporting week, February 29 through March 6. One new...
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Over March 14-20, new sunspot groups emerged every day except March19. March 18 had two, and each of the other...