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  • latest090111

    09/02/2011 | The K7RA Solar Update

    Sunspot activity rose again this week, with the average daily sunspot number up nearly 18 points to 83, but the geomagnetic indices -- both planetary and mid-latitude -- were each down slightly. The high sunspot number for the week was 121, recorded on We
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  • latest081811

    08/19/2011 | The K7RA Solar Update

    Solar activity was down again this week. The sunspot number on Sunday, August 14 went all the way to 0 for the first time since January 27, which was 29 weeks ago. The average daily sunspot numbers declined nearly 50 points, to 25.6, while the average dai
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  • latest062311

    06/24/2011 | The K7RA Solar Update

    Over the past week -- June 16-22 -- the average daily sunspot number rose nearly 20 points to 55, while the average daily solar flux readings increased by nearly 9 points to 98.6. All geomagnetic indices declined slightly. These increases or decreases are
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  • latest041411

    04/15/2011 | The K7RA Solar Update

    On Wednesday, April 13, the daily sunspot number reached a new high for Solar Cycle 24 when it hit 153. I looked back over this calendar year and saw that the previous high was 137 on March 8, 2011, 16 points lower than Wednesday. That week’s Solar Update
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  • latest031011.jpg

    03/11/2011 | The K7RA Solar Update

    Solar Cycle 24 continued its upward trend this week. The average daily sunspot number was more than double the value of the week before, rising from 50.9 to 114, while the average daily solar flux rose 44 percent, from 96.8 to 139.4. All this week through
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  • latest022411.jpg

    02/25/2011 | The K7RA Solar Update

    The average solar flux was nearly unchanged this week, up just 0.3 point to 103.8, while the average daily sunspot number was down 4.9 points to 65. Sunspot groups 1161 and 1162 -- which brought so much activity last week -- have now rotated across our Su
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  • latest012011.jpg

    01/21/2011 | The K7RA Solar Update

    The average daily sunspot numbers dropped from 50 (on the reporting week ending January 5) to 38 on January 6-12, and now 21.3 on January 13-19. Sunspot numbers for January 13-19 were 14, 11, 11, 15, 36, 34 and 28, with a mean of 21.3. The 10.7 cm flux wa
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  • latest011411.jpg

    01/14/2011 | The K7RA Solar Update

    The average daily sunspot numbers declined 12 points to 38 during the past week, compared to the previous week, December 30 through January 5, when the average was exactly 50. Sunspot numbers for January 6-12 were 28, 52, 52, 50, 35, 26 and 23, with a mea
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