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  • latest020912

    02/10/2012 | The K7RA Solar Update

    Solar activity was down again this week -- this is the third week in a row with sunspot numbers lower than the week prior. On January 20, we reported an average daily sunspot number of 116.9 for January 12-18, 98.7 the next week, followed by 62 the week o
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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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  • latest012612

    01/27/2012 | The K7RA Solar Update

    This was another week where average daily sunspot numbers declined, while average daily solar flux increased. Sunspot numbers for January 19-25 were 117, 88, 102, 103, 108, 105 and 68, with a mean of 98.7. The 10.7 cm flux was 157, 141.2, 141.6, 141, 144.
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  • latest011212

    01/13/2012 | The K7RA Solar Update

    The average daily sunspot numbers were up this week by a tiny bit, from 88.1 to 90.6, while the average daily solar flux was down slightly, from 136.2 to 134.9. Sunspot numbers for January 5-11 were 99, 118, 110, 90, 90, 63 and 64, with a mean of 90.6. Th
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  • latest121511

    12/16/2011 | The K7RA Solar Update

    Solar activity dropped this week, with the average daily sunspot numbers declining more than 39 points to 94.7. It’s been 13 weeks since the average daily sunspot number for the week was that low or lower, when we reported an average of 91.7 in the Septem
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  • latest112811

    11/28/2011 | The K7RA Solar Update

    Recently, I mentioned recently that some of the sunspot numbers released by NOAA didn’t seem right. I just got word from Mike Husler at NOAA that data posted recently -- like that record-breaking day when the sunspot number hit 220 -- was wrong. The corre
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  • latest112311

    11/23/2011 | The K7RA Solar Update

    Not much in the way of solar excitement this week, except there are many sunspots, but the solar activity in terms of flares or coronal mass ejections is low. The overlapping (by one day) average sunspot numbers in this bulletin declined 21 points to 124.
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  • latest111711.jpg

    11/18/2011 | The K7RA Solar Update

    This week geomagnetic indices quieted a bit, as did solar activity in general. On November 9, sunspot numbers reached a high of 220, and this week, they declined, rose to 176 and then declined again. The average daily sunspot numbers slipped 8.4 points to
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