ARRL

Search for Amateur Radio News

  • 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

  • 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

  • 09/19/2008 | The K7RA Solar Update

    Last week saw another brief sunspot appearance followed by a quick fade. This was an old Solar Cycle 23 spot -- number 1001 -- resulting in a sunspot number of 12 for September 11. Sunspot numbers for September 11-17 were 12, 0, 0, 0, 0, 0 and 0 with a me
    Learn More

  • 05/02/2008 | The K7RA Solar Update

    For several weeks we expected today, May 2, to have active geomagnetic conditions. For instance, if you look at a forecast from April 23, it shows an expected planetary A index for May 1-3 of 10, 20 and 15. The next day, April 24, this changed to 8, 20 an
    Learn More