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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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04/16/2010 | The K7RA Solar Update
Weakened sunspots faded this week, and we were buffeted with more geomagnetic instability, but without the dramatic geomagnetic storms of the previous week. The average daily sunspot numbers fell more than 20 points to 12.1, and the average solar flux dro
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04/09/2010 | The K7RA Solar Update
A strong geomagnetic storm on Monday and Tuesday -- April 5-6 -- was the biggest since 2006, at least in terms of high planetary A index. On those days, the mid-latitude A index was 28 and 22 and the planetary A index was 49 and 46. This was caused by a m
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03/12/2010 | The K7RA Solar Update
We experienced a bit of a scare this week when four days went by without sunspots. That's right -- for the first time in three months, we saw more than a single day with a sunspot number of 0, and that last period was back during November 23-December 8.
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02/19/2010 | The K7RA Solar Update
We've now observed sunspots continuously for the past 30 days -- certainly a turnaround from the quiet conditions of the past few years. In fact, in 10 weeks, we have seen only three days with no sunspots: December 25, January 6 and January 19.
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