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Dalton Minimum


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December 31, 2008

Comments

BobM

The graphs are updated. December didn't show any uptick in activity that I can see:
http://www.swpc.noaa.gov/SolarCycle/index.html

Whatever the "Ap progression" signifies, it went down some more. That's the graph Anthony Watts noticed sometime ago has a step down as though something changed back in the autumn of 2005.

Russ Steele

Bob,

Thanks for the update! I sent Anthony Watts a note about the update. Maybe he can tell us what it means. The Dalton was about 200 years from the Maunder and we are about 200 years from the Dalton. I wonder if there is a 400 year cycle. Time for some more investigation.

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