GB2RS Propagation News
Propagation News – 1 October 2017
Last week was a mixed bag in terms of HF propagation. With the solar flux index just into the 90s, amateurs were able to take advantage of the improving autumnal conditions. At times, maximum usable frequencies over a 3,000km path were stretching up to and beyond 21MHz, with openings to the US being reported on […]
Propagation News – 24 September 2017
Last week saw sunspot numbers decline, but geomagnetic conditions become more settled. This, plus the fact we are heading into autumn, resulted in better HF conditions, with 21MHz opening to DX for short periods. The CS3B Madeira and 4X6TU Israel beacons on 21.150MHz were both audible at times and Jim, G3YLA reports working S01WS in […]
Propagation News – 17 September 2017
After the solar chaos of last weekend, things looked a little more settled at first. However, following last Sunday’s X8.2 solar flare, material from a coronal mass ejection impacted the Earth on Wednesday. The Solar Flux Index declined to 75 by Thursday, but we were seeing the geomagnetic effects of yet another coronal hole as […]
Propagation News – 10 September 2017
Last week the Sun caught every one out. While NOAA predicted the solar flux index would be in the mid-70s, the sudden appearance of a large number of sunspots pushed it up to 183 on Tuesday, although it had calmed down to 122 by Wednesday. This had a major impact on the bands, with openings […]
Propagation News – 3 September 2017
Last week saw the solar flux index climb into the high 80s. Our prediction that the weekend’s ionosphere might be unsettled was partly correct, as the effects of a coronal hole pushed the K index to three on Sunday, but this quickly recovered. We are now seeing a shift from predominantly summer ionospheric conditions to […]
Propagation News – 27 August 2017
Last week saw the solar flux index touch 90 as large sunspot group 2671 rotated into the centre of the solar surface. But, unfortunately, the predicted unsettled geomagnetic conditions, caused by a high-speed coronal hole solar wind stream, pushed the K index up to six early in the week. This hampered DX by pushing maximum […]
