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The K7RA Solar Update

ARRL

Well-Known Member
Nov 15, 2008
10,591
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Recent sunspot activity -- which ended on November 22 -- pushed up the moving average we've been tracking for several years. Because we have all the data for November, we now have the most recent 3-month average of daily sunspot numbers, which centers on October. For 2009, the 3 month moving average centered on January through October was 2.19, 2.02, 1.49, 2.01, 4.23, 5.2, 4.0, 4.0, 4.64 and 7.1. The latest value is the highest since April 2008, when it was 8.89. The monthly averages of daily sunspot numbers are also rising, although not as smoothly as the three month average. The monthly averages for March through November 2009 are 0.77, 1.27, 3.97, 6.6, 5.07, 0.39, 6.6, 7 and 7.7. The November average is the highest since March, 2008 when it was 15.87.



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