GB2RS Propagation News
Propagation News – 25 January 2015
Solar conditions were largely settled this week with the A index remaining firmly in single figures. NOAA’s prediction that the solar flux index would be around 130 last week appears to have been fairly spot on, with the SFI at 124 as this report was being prepared. The prediction this week is for more of […]
Propagation News – 18 January 2015
This week the solar flux index has been down a little compared with the pre-Christmas period. As the report was being prepared it stood at 142, with NOAA predicting it will decrease to 130 by the end of the week. There are currently no new visible sunspots rotating into view on the sun’s surface, which […]
Propagation News – 11 January 2015
As is usual this time of year we start with a retrospective look at 2014, and it looks like we passed the peak of Sunspot Cycle 24 in the spring. The peak solar flux index (SFI) for the cycle occurred on 23 October 2014 with 227, although there were plenty of other times when it […]
Propagation News – 28 December 2014
Due to the festive break this week’s HF forecast is being prepared earlier than normal, which makes it harder to predict solar conditions. What we can say is that the sun is likely to remain very active, with a high probability of solar flares and attendant coronal mass ejections. This week NOAA predicts the solar […]
Propagation News – 21 December 2014
The sun remains peppered with a large number of spots. This has kept the solar flux index up in the 160s, even peaking at 192 on the 18th. This has also brought a lot of M and C class solar flare activity with associated short-term blackouts, although there have been no mammoth X-class events. Continuing […]
Propagation News – 14 December 2014
NOAA and the US Air Force had predicted that last week’s solar flux index would be in the range 160 to 180, which turned out to be slightly over-optimistic. Geomagnetic conditions were also predicted to be unsettled towards the end of last week due to a recurrent coronal hole, but reality was a little better. […]
