ARRL News

1. The ARRL Solar Update

   Solar flare activity is expected to remain at very low levels, with a
   chance for isolated C-class flares through September 19, according to
   NOAA's Space Weather Prediction Center (SWPC). Solar wind speed was
   steady near 530 km/s, and negative polarity CH HSS (coronal hole
   high-speed stream) effects are anticipated to persist through September
   18, with additional enhancements likely today due to flan...

2. Get Ready for Jamboree on the Air

3. Contest University Celebrates 100 Years of Yagis

   The Yagi-Uda beam antenna was invented 100 years ago, in 1926, and Contest University (CTU) is celebrating its centennial with a live Zoom webinar this Saturday, September 19, 2026, at 1600 UTC (noon Eastern). The free webinar, titled “The Yagi Turns 100,” will be available online at https://w3lif.org/yagi. There is no pre-registration. Click on the link before 1600 Zulu on Saturday to watch. Q...

4. The ARRL Solar Update

   Solar flare activity was at low levels in the past week with
   isolated C-class flare activity, according to NOAA’s Space Weather
   Prediction Center. The largest flare of the period was a C3.4 on
   September 8 from otherwise stable Region 4528. Region 4530 developed
   asymmetric penumbra on both its leading and trailing poles while
   undergoing consolidation in its intermediate area. New flux
   emergence in the...

5. Special HAARP Transmission for 9/11

   To commemorate the 25th anniversary of the September 11, 2001 attacks on the United States, the High-frequency Active Auroral Research Program (HAARP) at the University of Alaska Fairbanks will be making a special transmission on 9.11 MHz at 0030-0035 UTC on September 12, 2026 (8:30-8:35 PM eastern time Friday evening). The transmission will consist of a Morse code QST, followed by a slow-scan...