GB2RS Propagation News
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. […]
Propagation News – 7 December 2014
As predicted, HF conditions were very good for the CQ Worldwide contest last weekend, although NOAA were wrong with their predicted solar flux index. Instead of 135 it was actually 177. There were no major flares or coronal mass ejections to upset the ionosphere with the result that all of the HF bands were very […]
Propagation News – 30 November 2014
The sun remained peppered with smaller sunspots this week, driving the solar flux index to a peak of 169. This kept the ham bands humming, with the maximum useable frequency easily above 28MHz on many paths during the daytime. Night-time highs reached 10MHz at times on longer paths, but 7MHz and 3.5MHz have both been […]
Propagation News – 23 November 2014
As we predicted last week, sunspot region 2209 has been active, emitting a number of M- and C-class solar flares, although it is nowhere near as violent as it was on its last rotation. The solar flux index remained relatively high during the week, peaking at 170. The latest NOAA/USAF forecast predicts the solar flux […]
Propagation News – 16 November 2014
The sun has remained active this week, with the solar flux index remaining in the range 132 to 142. There have been continued M-class solar flares from sunspot group 2205. Becoming more Earth-facing this week are regions 2207 and 2208. Region 2208 has increased in area and complexity and shows a risk of solar flares, […]
