ARRL

Search for Amateur Radio News

  • Sunspot041510

    04/16/2010 | The K7RA Solar Update

    Weakened sunspots faded this week, and we were buffeted with more geomagnetic instability, but without the dramatic geomagnetic storms of the previous week. The average daily sunspot numbers fell more than 20 points to 12.1, and the average solar flux dro
    Learn More