Solar activity reached moderate levels due to an isolated M1.5/1nflare on March 19 at 2040 UTC from Region AR4031. Regions...
Aurora
Geomagnetic field activity is expected to be at minor storm levels for March 18, and then from March 27 and...
Spaceweather.com is reporting "A Hole In The Sun's Atmosphere" thatshould reach Earth on March 9 and 10. Solar activity has...
A Coronal Mass Ejection (CME) associated with a filament eruptionbecame visible on February 26 at 1448 UTC. Model analysisdetermined this...
Solar activity is expected to range from low to moderate levelsthrough March 15. There is a varying chance for R1...
NOAA reports a G1 (Minor) geomagnetic Storm Watch has been issuedfor 14 Feb, 2025. A coronal hole high speed stream...
Spaceweather.com reports that sunspot 3981 has produced more than 20M-class solar flares, including two that almost reached category X. The...
Solar Update Report January 30, 2025 The sun has been moderately active this past week. The greater than 2 MeV...
Last week was pretty unremarkable as far as the Sun goes, but it looks like that is about to change....
Sorry to say this is the last ARRL Propagation Forecast Bulletin Iwill write. I took over in 1991 from Ed...
Solar activity was a bit weak during recent days. Average dailysunspot number was 159.1. During the previous week the average...
Currently a geomagnetic storm is raging. On January 1-2, Alaska'scollege A index reached 113. Predicted planetary A index is 12...
Strong solar activity continues, with worldwide propagation on 10and 12 meters quite commonplace. Predicted solar flux is 255, 250, 210,...
Solar activity seems to have dropped dramatically from a recent peak. Are we over the cycle peak and headed down...
ARRL Headquarters was closed on November 29. So, this regular Fridaybulletin was moved to the following Monday (12/2). Solar activity...
Solar activity was lower this reporting week, November 14-20, withthe average daily sunspot number down from 141.6 to 99.3, and...
Key solar indicators were lower this week, with average daily solarflux down from 194.3 to 170.5 and average daily sunspot...
Thanks to Carl, K9LA for contributing to this week's bulletin. "SUBJ: ASWFC GEOMAGNETIC DISTURBANCE WARNING ISSUED AT 2220 UTC/10 OCTOBER...
What a difference a week makes when it comes to HF propagation! This last week has been characterised by solar...
ASWFC GEOMAGNETIC DISTURBANCE WARNING ISSUED AT 0042UT/04 OCTOBER 2024 BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE. Two coronal mass ejections...
Aurora Propagation, Northern Lights The sun has been busy, and it’s been a mixed bag for radio amateurs. Earlier this...
Release Date: May 18, 2024 Here is a summary of the news trending This Week in Amateur Radio. This week's...
This is a 1-hour version of the weekly podcast for This Week in Amateur Radio. For the full version please...
Coronal mass ejections from the sun are plasma with magnetic fields. They can collide with Earth’s magnetosphere, causing the auroras...
Many interesting phenomena can be observed in the high frequency radio band including aurora reflections, meteor trail reflections, radio blackouts,...
