ARRL

Search for Amateur Radio News

  • Cycle 24 sunspot predix

    12/17/2013 | Solar Scientists Say Cycle 24 is the Weakest in More than a Century

    Scientists say Cycle 24 is the weakest in more than 100 years.
    Learn More

  • Solar Flare

    11/15/2013 | The K7RA Solar Update

    Daily sunspot numbers are rising to levels not seen since the previous solar cycle.
    Learn More

  • latest010413.jpg

    01/04/2013 | The K7RA Solar Update

    The New Year brings dreams of solar cycles of old, so distant now, sweetly remembered for their profusion of sunspots. We hear many times from operators who became licensed as teenagers at the peak of Solar Cycle 19, in the late 1950s, when a few watts an
    Learn More

  • latest111612

    11/16/2012 | The K7RA Solar Update

    There has been an exciting and dramatic rise in sunspot activity this week. The daily sunspot number was 188 on Monday, November 12 -- higher than it has been in more than a year.
    Learn More

  • latest101812

    10/19/2012 | The K7RA Solar Update

    Sunspot activity rose this week, with the average daily sunspot numbers up more than 45 points to 97, while the average daily solar flux rose more than 24 points to 129.2.
    Learn More

  • latest101212

    10/12/2012 | The K7RA Solar Update

    There was another decline in sunspot activity this week, but based on activity over the past few days, combined with the projected solar flux values, it is making a steady recovery.
    Learn More

  • latest083112

    08/31/2012 | The K7RA Solar Update

    Although solar activity is quite low, there was an increase in sunspot numbers and in the solar flux over the past week. The average daily sunspot numbers were up nearly 20 points -- about 36 percent -- to 74.1, while the average daily solar flux increase
    Learn More

  • latest032312.jpg

    03/23/2012 | The K7RA Solar Update

    Solar activity declined this week: The average daily sunspot numbers were off by more than 13 points to 75.1, while the average daily solar flux dropped over 32 points to 102.1. The solar flux dropped barely below 100, but rounded up to 100 as shown on th
    Learn More