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  • 06/05/2009 | The K7RA Solar Update

    It is so great to see some real Solar Cycle 24 sunspot activity this week. Instead of a phantom that pops into view one day and is gone the next, we have sunspot 1019, which has persisted for five days so far. Emerging on Sunday, May 31, the resulting dai
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  • 04/03/2009 | The K7RA Solar Update

    Our Sun is in the news again, unfortunately not due to any hoped-for activity, but for the eerie quiet instead. The Sun is surprisingly calm by several measurements -- including the large number of spotless days -- with an average 10.7 cm solar flux and l
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  • 02/20/2009 | The K7RA Solar Update

    We saw a sunspot on February 11-13, then it was gone. Typical of sunspots recently, it was only seen briefly; this one was a relic of Solar Cycle 23, according to its magnetic signature. For at least a couple of years now, we've been expecting Solar Cycle
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  • 01/02/2009 | The K7RA Solar Update

    2008 was a year of very low solar activity. More than 40 percent of this year's propagation bulletins reported zero sunspots for their respective weeks. The average daily sunspot number for the year was 4.7; in 2007, it was 12.8. The yearly averages of da
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  • 11/07/2008 | The K7RA Solar Update

    Sunspot 1007 is still there, but probably rotating off the visible solar disk sometime today. This is the eighth sunspot of the new solar cycle -- and also the largest. Sunspot numbers for October 30-November 5 were 13, 16, 16, 17, 18, 14 and 11 with a me
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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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  • 07/11/2008 | The K7RA Solar Update

    Another week and still no sunspots. The 3-month moving average for daily sunspot numbers that we began reporting toward the end of Solar Cycle 23 seemed to retrospectively suggest that solar minimum occurred last fall. The daily average for the 3-month pe
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  • 07/03/2008 | The K7RA Solar Update

    This week's bulletin is presented a day earlier than usual, due to the Independence Day holiday on Friday. The weeks seem to drag on with no sunspots in sight. An image from helioseismic holography on Tuesday shows a spot on our
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