ARRL

Search for Amateur Radio News

  • 09/04/2009 | The K7RA Solar Update

    This week we saw another one of those fast-disappearing sunspots -- it lasted just two days, over the last day of August and the first of September. No other sunspots were observed during the month of August. Sunspot numbers for August 27-September 2 were
    Learn More

  • 08/07/2009 | The K7RA Solar Update

    We had some nice sunspot activity from July 3-10 -- and we were hoping for a return 27-28 days later -- but it never happened. Varying by latitude, the Sun rotates relative to Earth about every 27.5 days. If that same region was still active or the activi
    Learn More

  • 07/31/2009 | The K7RA Solar Update

    No sunspot activity this week, and if no sunspot appears today, July 31, the average sunspot number for July will be 5.1; this is down from June's average of 6.6. The monthly average of the daily sunspot number, January-July 2009, is 2.8, 2.5, 0.8, 1.3, 4
    Learn More

  • 07/17/2009 | The K7RA Solar Update

    We saw a nice run of eight days with a large sunspot, but none have emerged in the six days since. Unlike other recent spots, this one did not appear just for one or two days and then vanish. Sunspot numbers for July 9-15 were 15, 13, 0, 0, 0, 0 and 0 wit
    Learn More

  • 07/10/2009 | The K7RA Solar Update

    Finally, some sunspot activity to report -- and not one of those phantom spots that appear one day and vanish the next. Sunspot group 1024 first emerged a week ago on July 3 with a daily sunspot number of 17 and the magnetic signature of a new Solar Cycle
    Learn More

  • 06/19/2009 | The K7RA Solar Update

    I bet you have this memorized: "Solar activity was very low throughout the reporting period, and geomagnetic field activity was at quiet levels during most of the reporting period." Enough said? The first sunspot region of Solar Cycle 24 occurre
    Learn More

  • 05/29/2009 | The K7RA Solar Update

    That was a nice string of days showing a sunspot -- May 13-19 -- a whole week. Then it was gone, but a few days later on May 23, another Solar Cycle 24 sunspot emerged, this time in our Sun's southern hemisphere. But it was another of those phantom spots.
    Learn More

  • 05/15/2009 | The K7RA Solar Update

    After weeks of little or no sunspots, it is nice to have something to report: Following multiple false starts, quick-fading spots and knots of magnetic activity that never progressed into actual darkened sunspots, new sunspot group 1017 emerged on Wednesd
    Learn More