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We're not sure, although this is a matter of intense study. We know that there is a correlation between low sunspot numbers and low solar activity, and we know that there is a correlation between high numbers of sunspots and high solar activity. We're pretty sure that one doesn't cause the other, but that both are caused by some other factor of which we are not yet aware.

There have been two recorded periods in the last few hundred years during which there was a long spell of lower-than-normal sunspot activity, and these are named for the astronomers who noted them. These were called the "Maunder Minimum" and the "Dalton Minimum", and each was followed by a period of unusually cool weather.

Here also, we're not sure what the relationship is, or if it was just coincidental.

If you would like to see the current sunspot number and a photo of the Sun today, visit spaceweather.com at the link below.

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Maude Kulas

Lvl 13
3y ago

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