ARRL

Search for Amateur Radio News

  • 08/22/2008 | The K7RA Solar Update

    Another week of quiet Sun, but on Wednesday and Thursday -- August 20-21 -- a new spot seemed to be emerging, but there is no sign that it is anything other than an old Solar Cycle 23 spot. Spaceweather.com reported it with a sunspot number of 11 for Augu
    Learn More

  • 08/08/2008 | The K7RA Solar Update

    As mentioned in last week's report, Carl Luetzelschwab, K9LA, is filling in for your regular reporter Tad Cook, K7RA. For the reporting period August 1-7, solar activity was at very low levels and the geomagnetic field was at quiet levels. Solar activity
    Learn More

  • 08/01/2008 | The K7RA Solar Update

    July ended with no sunspots at all -- save for three days, July 18-20, when one weak sunspot group appeared and faded from view. Sunspot numbers for those days were 11, 12 and 11. Sunspot numbers for July 24-30 were 0, 0, 0, 0, 0, 0 and 0 with a mean of 0
    Learn More

  • 07/18/2008 | The K7RA Solar Update

    If today is like yesterday and the day before that, it will be the 26th consecutive day with no sunspots. Think this is bad? At the last solar minimum, there were only four days showing any sunspots between September 5 and October 24, 2006.
    Learn More

  • 07/03/2008 | The K7RA Solar Update

    This week's bulletin is presented a day earlier than usual, due to the Independence Day holiday on Friday. The weeks seem to drag on with no sunspots in sight. An image from helioseismic holography on Tuesday shows a spot on our
    Learn More

  • 06/27/2008 | The K7RA Solar Update

    Recent days graced by sunspots were short lived. June 10-June 13 saw a single sunspot group, followed by two days with no spots then a week of spots from June 16-22. During that week, the sunspot number was 11 every day, the lowest non-zero sunspot number
    Learn More

  • 06/20/2008 | The K7RA Solar Update

    We are lucky to see sunspot activity this week, although it is only one. Sunspot 999 is currently in its most geo-effective position -- near the center of the Sun -- as we see it. This is another old Solar Cycle 23 spot. The sunspot number for the last fe
    Learn More

  • 06/13/2008 | The K7RA Solar Update

    Sunspot 998 emerged this week, another old Solar Cycle 23 sunspot near the Sun's equator. Daily sunspot numbers for June 10-12 were 14, 11 and 13. Last Sunday, June 8, had the lowest 10.7 cm solar flux value I've ever seen -- 64.9 -- at the observatory in
    Learn More