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  • latest062812

    06/29/2012 | The K7RA Solar Update

    Sunspot activity continued to drop until early this week: The average daily sunspot numbers were 26.3, down more than 58 points from last week’s numbers, while the average daily solar flux declined to 92.8, down over 33 points from last week’s average.
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  • latest050412

    05/04/2012 | The K7RA Solar Update

    The average daily sunspot numbers declined 38 points to 106.7 this week, while the average daily solar flux declined nearly 18 points to 116.2. Sunspot numbers for April 26-May 2 were 117, 99, 118, 114, 104, 99 and 96, with a mean of 106.7. The 10.7 cm fl
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  • latest011912

    01/20/2012 | The K7RA Solar Update

    New sunspot groups appeared on every day over the past week. On January 12, new sunspot group 1396 appeared, and the next day two more -- 1397 and 1398 -- popped into view. On January 14, four new sunspot groups appeared: 1399, 1400, 1401 and 1402. Januar
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  • latest122311

    12/23/2011 | The K7RA Solar Update

    The average daily sunspot numbers this week were about the same as last week, while the average daily solar flux declined a little more than eight points to 128.9. Geomagnetic indicators were quiet. The average daily sunspot numbers of 95.3 for the week i
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  • Irene_fromISS.jpg

    09/01/2011 | Hams from North Carolina to Maine Provide Communication Support Before, During and After Hurricane Irene

    Hurricane Irene -- the first major hurricane of the 2011 hurricane season -- left extensive flood and wind damage along its path through the Caribbean, the East Coast of the United States and as far north as Atlantic Canada. Beginning on August 20 as then
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  • bml_codar_sunset.jpg

    08/15/2011 | ARRL and California Researchers Team Up to End 12 Meter Interference

    After the resolution of the recent 60 meter CODAR situation on the East Coast, the ARRL noted an earlier report by John Terrell, N6LN, of Palos Verdes, California. Terrell described CODAR activity on the 12 meter band, from 24.93 to 25.058 MHz. Since it a
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  • codar_sunset.jpg

    08/03/2011 | Investigation by ARRL OOs, Researchers Leads to Resolution of 60 Meter Interference

    Collaboration between ARRL Official Observers and researchers at Rutgers University has resulted in a change of operating frequency of coastal HF radars, eliminating interference to amateur stations using two frequencies in the 60 meter (5 MHz) band,
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