GB2RS Propagation News
Propagation News – 24 April 2022
Last week was characterised by solar flares – lots of them! There were numerous strong flares, although the majority occurred in the early hours and so didn’t affect the ionosphere over Europe. Solar flare events can cause short-lived radio blackouts as the energetic photons penetrate deep into the D-layer. Solar activity during the past 30 […]
Propagation News – 17 April 2022
We had a week with declining solar flux index numbers, but with the ever-present threat of coronal mass ejections. The SFI declined from 101 on Sunday to 96 on Wednesday with the possibility of further falls as the week goes on. A solar filament located near the centre disk of the Sun erupted early Monday […]
Propagation News – 10 April 2022
We had another week of high-ish solar flux numbers, but this time we had relatively settled geomagnetic conditions that really allowed the ionosphere to play ball for radio amateurs. The week started well with the SFI above 140, which then declined as the week went on and was at 117 on Thursday. The maximum Kp […]
Propagation News – 03 April 2022
Last week we said there was a sense of excitement as it looked like the solar flux index would increase. But even NOAA didn’t predict that it would rise to 156, which it hit on Monday the 28th. Unfortunately, along with high sunspot numbers, we have had unsettled geomagnetic conditions. On Sunday and Monday last […]
Propagation News – 27 March 2022
We had a good week of HF propagation with moderate solar flux index numbers and generally quiet geomagnetic conditions. The KP index has not been above three, at least by Thursday when this was written. And the SFI has been hovering around the 100 mark, which was enough to stir 12 metres into action with […]
Propagation News – 20 March 2022
Well, what a mixed week of solar activity we have just had. Last week, we forecast that we could expect unsettled geomagnetic conditions over the last weekend, but we didn’t expect to see the Kp index hit six. Sunday the 13th saw ground-based magnetometers hit hard with at least 15 hours of unsettled conditions, when […]
