GB2RS Propagation News
Propagation News – 3 December 2023
We were lucky last week – the solar flux index remained quite high and, after the geomagnetic upsets around the 25 November, we had settled conditions, with the Kp index below two. Unfortunately, it looks like that is all about to change. On Tuesday 28 November, two M-class solar flares and associated coronal mass ejections […]
Propagation News – 26 November 2023
What a difference a week makes! Last week the solar flux index was at 118 but, by Thursday the 23 November, it had climbed up to 190 with the Sun’s surface covered in spots with up to nine groups showing. The maximum useable frequency over a 3,000km path was estimated at more than 40MHz at […]
Propagation News – 19 November 2023
We had another rollercoaster week with periods of reasonably settled geomagnetic conditions followed by more unsettled times. Luckily, it didn’t get too bad, as it did when the Kp index hit seven the week before. This, coupled with a lower solar flux index of 119 on Thursday, has meant HF conditions have not been outstanding. […]
Propagation News – 12 November 2023
Last week was characterised by very unsettled geomagnetic conditions which took their toll on the high-frequency bands. The Kp index hit seven on the 5 November, sparking visible aurora all over the UK. This also caused auroral conditions on the bands with many people commenting on the auroral flutter on the lower HF bands and […]
Propagation News – 5 November 2023
The last two weeks have not been too bad for HF propagation, but not particularly good either. The solar flux index hit lows of 119 on the 22 October and 121 on the 24th, but subsequently recovered and stood at 159 on Thursday 2 November. This at least allayed the fears of some amateurs that […]
Propagation News – 29 October 2023
It was not a good week for the ionosphere with the Solar Flux Index, or SFI, falling to less than 130, plus some disturbed geomagnetic conditions as well. On Wednesday the 24 October, the SFI fell to 121, while the following day the Kp index hit 4.33 thanks to a coronal mass ejection from a […]
