ARRL

Search for Amateur Radio News

  • 12/12/2008 | The K7RA Solar Update

    Finally! A sunspot group appeared this week, about three weeks since the last group disappeared. The first spotless day after sunspot group 1008's last appearance was Tuesday, November 18; the last spotless day before group 1009 emerged was Tuesday, Decem
    Learn More

  • 11/26/2008 | The K7RA Solar Update

    This is an early bulletin for the Thanksgiving holiday, as ARRL is closed on Friday, the regular day for release of this bulletin. We plan another brief regular propagation bulletin on Monday, December 1 that will contain the propagation numbers for Novem
    Learn More

  • 11/07/2008 | The K7RA Solar Update

    Sunspot 1007 is still there, but probably rotating off the visible solar disk sometime today. This is the eighth sunspot of the new solar cycle -- and also the largest. Sunspot numbers for October 30-November 5 were 13, 16, 16, 17, 18, 14 and 11 with a me
    Learn More

  • 10/31/2008 | The K7RA Solar Update

    Solar Cycle 24 is slowly building momentum. We saw sunspots for eight days in a row -- October 10-17 -- then 12 days of no spots. Another sunspot -- number 1007 -- appeared on October 30 from Solar Cycle 24. It is a high latitude sunspot and may provide s
    Learn More

  • 10/24/2008 | The K7RA Solar Update

    Visible sunspots continued last week for eight days straight, the longest continuous period of sunspot visibility since the 12 days of March 23April 3 last year. Sunspot numbers for October 16-22 were 24, 11, 0, 0, 0, 0 and 0 with a mean of 5. The 10.7 cm
    Learn More

  • 10/17/2008 | The K7RA Solar Update

    Finally, we are seeing Solar Cycle 24 sunspots that don't emerge on one day, only to evaporate the next. That's right -- sunspots, as in two or more. On Friday, October 10, sunspot 1005 emerged at high latitude over our Sun's eastern limb; that day's suns
    Learn More

  • 10/03/2008 | The K7RA Solar Update

    The sunspot appearance reported last week seems to follow the pattern emerging for most of 2008. A spot will appear for one or two days and then suddenly it is gone. Last week's report mentioned the solar wind being at an all time low. This week, NASA ann
    Learn More

  • 09/26/2008 | The K7RA Solar Update

    This week saw the appearance of another sunspot -- a new Solar Cycle 24 spot -- larger and lasting a little longer than last week's Solar Cycle 23 sunspot. It appeared for two days, September 22 and 23, with sunspot numbers of 18 and 16.
    Learn More