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  • latest030112

    03/02/2012 | The K7RA Solar Update

    The average daily sunspot number this week was down 12 points from the previous week, and the solar flux was about the same. Sunspot numbers for February 23-29 were 52, 47, 47, 58, 45, 35 and 22, with a mean of 43.7. The 10.7 cm flux was 103.3, 108.9, 108
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  • latest020212

    02/03/2012 | The K7RA Solar Update

    Here are some yearly averages that we have neglected at the beginning of the year. These are the average daily sunspot numbers for whole calendar years, from 1994-2011: 48.1, 28.7, 13.2, 30.7, 88.7, 136.3, 173, 170.3, 176.7, 109.2, 68.6, 48.9, 26.1, 12.8
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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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  • sunspot021810

    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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