After weeks of calm, solar activity is suddenly high again, with twostrong solar flares erupting from opposite sides of the...
sunspot
The Solar Geophysical Activity Report and Forecast from theUSAF/NOAA indicates that solar activity has been at low levels forthe past...
On May 2, Spaceweather.com reported: "Astronomers are monitoring avery large sunspot now turning toward Earth. Sunspot AR4079stretches more than 140,000...
Solar activity has been at low levels with only minor C-classflaring through April 24, 2025, and is expected to be...
Spaceweather.com reports a Cannibal Coronal Mass Ejection on April 15 sparked geomagnetic storms. On April 16, the storm became severe...
Due to most of the regions on the solar disk being fairly simple intheir magnetic complexity, solar activity is expected...
Solar activity is likely to be moderate (R1-R2, Minor-Moderate) witha slight chance for X-class flares through April 5. The geomagnetic...
On Wednesday, March 26, around 2130 UTC a Major Storm occurred. Atone point, the Planetary A Index was 49, and...
Solar activity reached moderate levels due to an isolated M1.5/1nflare on March 19 at 2040 UTC from Region AR4031. Regions...
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...
Solar activity was a bit lower this week. Seven new sunspot groups appeared. The only day with no new sunspot...
