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  • 03/13/2009 | The K7RA Solar Update

    Last week's bulletin again mentioned briefly appearing sunspots and it happened again this week. For just two days, another Solar Cycle 23 spot appeared, number 1014. The latitude of the spot was consistent with an old and fading solar cycle. As this peri
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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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  • 10/17/2008 | The K7RA Solar Update

    Finally, we are seeing Solar Cycle 24 sunspots that don't emerge on one day, only to evaporate the next. That's right -- sunspots, as in two or more. On Friday, October 10, sunspot 1005 emerged at high latitude over our Sun's eastern limb; that day's suns
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  • 09/26/2008 | The K7RA Solar Update

    This week saw the appearance of another sunspot -- a new Solar Cycle 24 spot -- larger and lasting a little longer than last week's Solar Cycle 23 sunspot. It appeared for two days, September 22 and 23, with sunspot numbers of 18 and 16.
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  • 08/01/2008 | The K7RA Solar Update

    July ended with no sunspots at all -- save for three days, July 18-20, when one weak sunspot group appeared and faded from view. Sunspot numbers for those days were 11, 12 and 11. Sunspot numbers for July 24-30 were 0, 0, 0, 0, 0, 0 and 0 with a mean of 0
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  • 06/27/2008 | The K7RA Solar Update

    Recent days graced by sunspots were short lived. June 10-June 13 saw a single sunspot group, followed by two days with no spots then a week of spots from June 16-22. During that week, the sunspot number was 11 every day, the lowest non-zero sunspot number
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  • 06/13/2008 | The K7RA Solar Update

    Sunspot 998 emerged this week, another old Solar Cycle 23 sunspot near the Sun's equator. Daily sunspot numbers for June 10-12 were 14, 11 and 13. Last Sunday, June 8, had the lowest 10.7 cm solar flux value I've ever seen -- 64.9 -- at the observatory in
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  • 04/11/2008 | The K7RA Solar Update

    As of Thursday, April 10, there have been no sunspots for seven days. We may see sunspots return around April 21-28. This is based on recent activity rotating out of view around the Sun and (we hope) reappearing later this month.
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