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01/08/2010 | The K7RA Solar Update
Recent sunspot activity is increasing, and the numbers bear this out. The average daily sunspot number for 2009 was 5 and the average for 2008 was 4.7.
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12/31/2009 | The K7RA Solar Update
Here we are, on the last day of the year, with finally some very positive indicators for Solar Cycle 24. Each day since December 9 (except for Christmas Day), sunspots have been visible. The average daily sunspot numbers for the week December 24-30 were 1
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12/19/2009 | The K7RA Solar Update
Sunspot activity continued this week; new group 1035 emerged December 14, following group 1034 that appeared December 9. Daily sunspot numbers since December 9 through December 17 have been 13, 13, 13, 12, 14, 28, 38, 30 and 24. Solar flux values have bee
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12/11/2009 | The K7RA Solar Update
Finally! A sunspot appeared on Wednesday, December 9, giving us a daily sunspot number of 13, following 16 days of no sunspots. And on December 10, the sunspot number was 13. The new group is number 1034, and it is a Solar Cycle 24 spot, as all sunspots h
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Feature
12/08/2009 | Amateur Radio Quiz: From One End to the OtherAt the bottom of the solar cycle during the month of the winter solstice, there are two contests that span the limits of our MF/HF spectrum. The ARRL 160 Meter Contest ran last weekend and conditions were expected to be excellent. The other is the AR
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12/04/2009 | The K7RA Solar Update
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
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11/30/2009 | The K7RA Solar Update
Our exciting period of nearly daily sunspot activity ended with the first spotless day on November 23 and the Sun has been blank since then. A look at the STEREO image shows a bright active area, perhaps five days over the eastern horizon, but we don't kn
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11/25/2009 | The K7RA Solar Update
This edition of the Solar Update will be brief. Since ARRL Headquarters is closed on Thanksgiving Day and the day after, I hope to have another bulletin out Monday morning to catch up with the sunspot, solar flux and geomagnetic data information.
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