There were two nights of visible aurora throughout the continentalUS and dead HF bands due to a severe geomagnetic storm...
coronal mass ejection
Solar activity has reached high levels due to a pair of X-classflares. The first was an X1.8 on November 4 from...
Solar activity has decreased to very low levels. Region 4266exhibited signs of slight development as it gained asymmetricpenumbra surrounding its...
Solar activity reached moderate levels this past week, but has nowreturned to, and remains at, lower levels. Region 4248 produced...
Region AR4246 underwent significant evolution, growing in overall size while gaining multiple new spots. Subsequently, AR4246 was the main provider...
Solar activity, which has been at low levels, has returned tomoderate levels. Region AR4232 produced the largest event of theperiod,...
Release Date: July 19, 2025 Here is a summary of the news trending…This Week in Amateur Radio. This week's edition...
This is a 1-hour version of the weekly podcast for This Week in Amateur Radio. For the full version please...
Release Date: July 19, 2025 Here is a summary of the news trending…This Week in Amateur Radio. This week's edition...
Solar activity has been at low levels for the past 48 hours, withlow-level C-class flares. There was a narrow coronal mass...
Last week we mentioned a large coronal hole on the Sun that might cause problems. The hole is so large...
A Coronal Mass Ejection (CME) associated with a filament eruptionbecame visible on February 26 at 1448 UTC. Model analysisdetermined this...
Excellent HF conditions greeted hams in the ARRL 10-Meter contestlast weekend. Recent indicators show a sudden shift to two digitdaily...
Average daily sunspot number plummeted to 104.4. Weekly Commentary on the Sun, the Magnetosphere, and the Earth's Ionosphere for December...
Tap or click the link below to download this week’s news script News script for 17 November 2024 (MS Word...
Only five new sunspot groups emerged this week. First was onNovember 7, next on November 9, two more on November...
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...
Solar activity was quiet over the past week, but geomagnetic numberswere way, way up. Average daily sunspot numbers dropped from...
Periods of G3 (Strong) geomagnetic storms are likely on 16 Sep 2024 due to coronal hole influences and the anticipated...
With sunspot numbers up and solar flux decreasing, we saw ten newsunspot groups this week; two on September 6, three...
Eight new sunspot groups emerged over the past week. Two appeared on August 30, three more on August 31, another...
"ASWFC GEOMAGNETIC DISTURBANCE WARNING ISSUED AT 0200 UTC/29 AUGUST 2024 BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE. The solar wind...
Ten new sunspot groups appeared over this reporting week (August 15-21), but both solar flux and sunspot numbers were lower,...
