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Sun Burn

Spotless Days

Question

As of today  12/11/19, another website lists the number of consecutive spotless days as 28, with 268 spotless days in the year. Are there other entities - Gov & Scientific, that count spotless days another way? Why the discrepancy? Is there some debate on what a sunspot is?

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On Novembert 13th there was a new region number assigned to a very shirt lived spot. SWPC didn't count it as a sunspot that was visible at midnight local time. SILSO of the SIDC did count it as a day with a tiny speckle on the sun. The official numbers should be from SILSO as they are the official source of the sunspot number. Probably, because of the time difference between the recording of SILSO and SWPC, the tiny speckle wasn't visible anymore and thus by that instance not counted.

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