ARRL

Search for Amateur Radio News

  • 02/20/2009 | The K7RA Solar Update

    We saw a sunspot on February 11-13, then it was gone. Typical of sunspots recently, it was only seen briefly; this one was a relic of Solar Cycle 23, according to its magnetic signature. For at least a couple of years now, we've been expecting Solar Cycle
    Learn More

  • 02/13/2009 | The K7RA Solar Update

    Sunspots returned this week, or rather, one did, but it is an old Solar Cycle 23 spot. Sunspot 1012 has been visible the last couple of days, February 11-12. It is down near the Sun's equator, typical for spots from a previous cycle. It's nice to have a s
    Learn More

  • 01/23/2009 | The K7RA Solar Update

    Monday revealed another shy sunspot. Sunspot 1011 appeared suddenly, and then it was gone. Its configuration and location did not identify it as belonging to either Solar Cycle 23 or 24. On Monday, January 19 the sunspot number was 13. Sunspot numbers for
    Learn More

  • 01/09/2009 | The K7RA Solar Update

    On Wednesday, January 7, a sunspot appeared very briefly in the lower right portion of the Sun's image. It was so brief that NOAA did not record it on the Space Weather Prediction Center's daily solar data chart for that day. Spaceweather.com reported a s
    Learn More

  • 01/02/2009 | The K7RA Solar Update

    2008 was a year of very low solar activity. More than 40 percent of this year's propagation bulletins reported zero sunspots for their respective weeks. The average daily sunspot number for the year was 4.7; in 2007, it was 12.8. The yearly averages of da
    Learn More

  • 12/19/2008 | The K7RA Solar Update

    Last week's sunspot group was only visible for three days, December 10-12. The average daily sunspot number for all of 2007 was 12.8; if we see no sunspots for the rest of 2008, the average for this year will be 4.7. By comparison, the yearly averages of
    Learn More

  • 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

  • 12/01/2008 | The K7RA Solar Update

    Today's bulletin is going out on Monday instead of Friday, due to last week's Thanksgiving holiday. The last Solar Update was released on Wednesday, November 26. Starting Friday, December 5, we return to a regular Friday weekly bulletin schedule.
    Learn More