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  • Sunspot072210

    07/23/2010 | The K7RA Solar Update

    Sunspot activity increased recently, although it is foolish to call this a trend, since solar activity has great variability. Sunspot group 1087 was visible for 13 days over July 9-21. In millionths of a solar hemisphere, its size was 30, 100, 120, 130, 7
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  • A coronal mass ejection (CME).

    06/08/2010 | Space Weather and Solar Storms to be Topics at Upcoming Forum in Nation’s Capital

    The National Space Weather Program Council will be conducting a forum in Washington, DC next month. The Space Weather Enterprise Forum, scheduled for June 8 at the National Press Club, will discuss how solar storms affect today’s technological society. Th
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  • Sunspot060310

    06/04/2010 | The K7RA Solar Update

    The average daily sunspot numbers were up nine points to 25.3 for this week, compared to the May 20-26 period; the average daily planetary A index rose nearly 10 points to 14.3, and this rise in geomagnetic instability came with the increase in solar acti
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  • Sunspot050610

    05/07/2010 | The K7RA Solar Update

    Sunspots made a strong return this week -- and so did geomagnetic activity. The average daily solar flux increased 4.2 points to 79.6; on Wednesday, May 5, the daily sunspot number reached 77, the highest in nearly four years. The sunspot number hasn’t be
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  • Sunspot040810

    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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  • sunspot012910

    01/29/2010 | The K7RA Solar Update

    Recent sunspot activity is increasing, and the numbers bear this out.
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  • sunspot010810

    01/08/2010 | The K7RA Solar Update

    Recent sunspot activity is increasing, and the numbers bear this out. The average daily sunspot number for 2009 was 5 and the average for 2008 was 4.7.
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