GB2RS Propagation News
Propagation News – 12 May 2019
Sunspot group 2740 has now returned and is emitting a lot of radio noise. Solarweather.com reports large bursts have been recorded on 20 and 25MHz. The bursts sound like waves breaking on the shore and are caused by beams of electrons accelerated by explosions in the sunspot’s magnetic canopy. As the electrons slice through the […]
Propagation News – 5 May 2019
Well, it is now May and that means the sporadic E season has started. There have already been some sporadic E openings on 10m, but the best is yet to come. Meanwhile, a lack of sunspots and continuing coronal hole activity means F2-layer DX is a little harder to come by. Last week’s International Marconi […]
Propagation News – 28 April 2019
Last week saw the start of the sporadic E season. There were reports of openings on 10m, and Andy, M0NKR even reported working The Gambia on 28MHz. This may have been a lucky F2-layer opening, but a contact is a contact! Es signals from Czech Republic, Ukraine, Poland, Italy, Spain, and the French beacon F5ZEH […]
Propagation News – 21 April 2019
Last week was a little better propagation-wise. The Australian IPS T index, as used by the ASAPS computer program for predicting HF propagation frequencies, turn positive again after a week of being at zero or even negative. The T index can be best regarded as an “equivalent sunspot number” – the sunspot number which would […]
Propagation News – 14 April 2019
This has been a difficult time for HF. The solar wind has remained active and the Bz component exhibited several periods of prolonged southward deflection, meaning it more easily coupled with the Earth’s magnetic field. Solar wind speed ranged mostly from 425-475km per second and this was enough to keep the Kp index elevated, often […]
Propagation News – 7 April 2019
Last week saw more of the same as we head towards solar minimum, which is now expected to be some time in 2020. There was a slight increase in the solar flux index later in the week as a new embryonic sunspot appeared on the visible disk. A group of three solar coronal holes threatened […]
