Solar Minimum minimum. Bob Zimmerman, BehindtheBlack.com.

Nov 09, 01:00 AM
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11-08-2017

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Solar Minimum minimum. Bob Zimmerman, BehindtheBlack.com.

NOAA today posted its monthly update of the solar cycle, covering sunspot activity for October. That graph is posted below, with annotations.

October 2017 Solar Cycle graph

The graph above has been modified to show the predictions of the solar science community. The green curves show the community’s two original predictions from April 2007, with half the scientists predicting a very strong maximum and half predicting a weak one. The red curve is their revised May 2009 prediction.

After two straight months of rising sunspot activity, the number of sunspots plunged in October, returning the numbers almost exactly back to the general trend we have seen since 2014 when the solar maximum ended. While the short two month increase indicated that the minimum will not occur as soon as this long term trend suggests, the quick return to that trend this month suggests that it will.

Meanwhile, November is six days old and has yet to see any sunspots at all.

http://behindtheblack.com/behind-the-black/points-of-information/sunspot-update-for-october-2017/

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