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10/09/2009 | The K7RA Solar Update
Sweet memories of that 11-day run of sunspots ending on the second day of this month will eventually fade. So far, the number of spotless days is seven -- or perhaps eight by later today -- with the last sunspot seen on October 1. A peek at the latest STE
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05/29/2009 | The K7RA Solar Update
That was a nice string of days showing a sunspot -- May 13-19 -- a whole week. Then it was gone, but a few days later on May 23, another Solar Cycle 24 sunspot emerged, this time in our Sun's southern hemisphere. But it was another of those phantom spots.
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12/26/2008 | The K7RA Solar Update
Snow has fallen all week here in Seattle, and the Sun is still void of spots. We last saw sunspots on December 10, 11 and 12. The solar flux -- a measure of 2.8 GHz radio energy from our Sun -- has been running between 68-69 for weeks, except for December
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11/26/2008 | The K7RA Solar Update
This is an early bulletin for the Thanksgiving holiday, as ARRL is closed on Friday, the regular day for release of this bulletin. We plan another brief regular propagation bulletin on Monday, December 1 that will contain the propagation numbers for Novem
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10/10/2008 | The K7RA Solar Update
A familiar sight appeared this week, as a sunspot emerged for one day, then was gone. Based on its magnetic polarity and high position in our Sun's southern hemisphere, sunspot 1003 was a new Solar Cycle 24 sunspot; like all the other recent sunspots, it
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