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03/27/2009 | The K7RA Solar Update
Every day I check the 45 day forecast of planetary A index and solar flux from NOAA and the US Air Force. For quite some time now, the solar flux forecast has been the same: The projection shows 45 days of solar flux at 70, with no variation. I look at th
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01/30/2009 | The K7RA Solar Update
On Tuesday, January 27, we saw another one of those "almost-a-sunspot" emerge in the Sun's low latitude, so it was probably an old Solar Cycle 23 spot; it was gone the next day. Sunspot numbers for January 22-28 were 0, 0, 0, 0, 0, 0 and 0 with
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01/23/2009 | The K7RA Solar Update
Monday revealed another shy sunspot. Sunspot 1011 appeared suddenly, and then it was gone. Its configuration and location did not identify it as belonging to either Solar Cycle 23 or 24. On Monday, January 19 the sunspot number was 13. Sunspot numbers for
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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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12/19/2008 | The K7RA Solar Update
Last week's sunspot group was only visible for three days, December 10-12. The average daily sunspot number for all of 2007 was 12.8; if we see no sunspots for the rest of 2008, the average for this year will be 4.7. By comparison, the yearly averages of
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12/05/2008 | The K7RA Solar Update
This was another quiet week; the geomagnetic indicators hovered around zero and there were no sunspots. Look at the A values for mid-latitude, high latitude and global here. There was another unusually quiet period this week on Sunday, Monday and Tuesday
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12/01/2008 | The K7RA Solar Update
Today's bulletin is going out on Monday instead of Friday, due to last week's Thanksgiving holiday. The last Solar Update was released on Wednesday, November 26. Starting Friday, December 5, we return to a regular Friday weekly bulletin schedule.
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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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