ARRL

Secure Site Login

Search for Amateur Radio News

  • Solar flare

    10/24/2014 | The K7RA Solar Update

    Solar activity rebounded this week in spectacular fashion
    Learn More

  • latest030112

    03/02/2012 | The K7RA Solar Update

    The average daily sunspot number this week was down 12 points from the previous week, and the solar flux was about the same. Sunspot numbers for February 23-29 were 52, 47, 47, 58, 45, 35 and 22, with a mean of 43.7. The 10.7 cm flux was 103.3, 108.9, 108
    Learn More