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10/01/2010 | The K7RA Solar Update
HF radio conditions were good over this past week, with the average daily sunspot numbers up more than 5 points to 45.3, and the average solar flux rising 1.5 points to 84.4. On Wednesday, September 29, the solar flux was 90.7; the last time flux values w
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09/24/2010 | The K7RA Solar Update
The autumnal equinox occurred early yesterday, at 0309 UTC on September 23. Conditions were good this week, with sunspots visible every day -- and very little geomagnetic activity. The average daily sunspot numbers rose more than 24 points to 40 and the a
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09/17/2010 | The K7RA Solar Update
The average daily sunspot numbers dropped nearly 23 points to 15.6 this week, and geomagnetic indices were quiet. The average daily solar flux was 78.1, but the latest prediction from USAF and NOAA calls for rising solar flux values. The September 17-23 p
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09/10/2010 | The K7RA Solar Update
The average daily sunspot numbers for the week rose nearly 13 points to 38.3, while the average daily solar flux was up more than four points at 78.4. On September 2, one new sunspot group emerged, numbered 1105, joining sunspot groups 1101, 1102 and 1103
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09/03/2010 | The K7RA Solar Update
Over this past week, four new sunspot groups appeared. Group 1101 was already in place since August 24, and 1102 emerged on August 29. On September 1, two new sunspot groups -- 1103 and 1104 -- appeared, and on September 2, sunspot group 1105 arrived. Thr
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08/27/2010 | The K7RA Solar Update
This week, we saw three days -- August 21-23 -- with no sunspots, and the average daily sunspot numbers for the week -- August 19-25 -- declined over 28 points to 8, compared to the previous week. The average daily solar flux was down more than 8 points t
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08/20/2010 | The K7RA Solar Update
Thanks so much to Tomas Hood, NW7US, who wrote last week’s bulletin while K7RA was in California at dance camp. Tomas writes the weekly propagation column for CQ magazine, and he has an excellent Web site devoted to propagation. Tomas mentioned that the A
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07/16/2010 | The K7RA Solar Update
Two new sunspot groups appeared in the last week -- groups 1087 and 1088. Group 1088 lasted just one day -- on July 13, 2010 -- with a relative area of 10 (millionths of a solar hemisphere). Sunspot group 1087 had a relative area from July 9-15 of 30, 100
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