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02/19/2016 | The K7RA Solar Update
Sunspot numbers slide
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03/20/2008 | The K7RA Solar Update
ARRL Headquarters is closed for Good Friday on March 21, so this bulletin is coming out a day early, and on the vernal equinox. We had a few more days with visible sunspots over the past week. Sunspot numbers on March 15-17 were 12, 12 and 11. Over the pa
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