GB2RS Propagation News
Propagation News – 23 January 2022
We had a bit of a geomagnetic roller coaster ride this week. The Kp index was down as low as one, and up as high as six, which sparked visible aurora at northern latitudes. This was caused by a solar wind stream, which reached nearly 600km per second and contained a significant southward Bz component. […]
Propagation News – 16 January 2022
We had a week of relatively low, but stable, sunspot numbers, which affected the maximum usable frequencies available. Having said that, the SFI was above 100 all week, but we didn’t get the surge in numbers that we really needed for good reliable ionospheric propagation. MUFs over a 3,000km path often exceeded 28MHz, but this […]
Propagation News – 9 January 2022
Welcome back to the GB2RS HF Propagation News. And we start the year on a bit of a downer, with the solar flux index back in the 80s. On Thursday the 6th, the SFI was at 84 with two active sunspot regions. This is probably going to be a short-lived lull in solar activity as […]
Propagation News – 26 December 2021
Given that this report has to last two weeks it is difficult to be precise in terms of actual HF conditions. What we can say is that we are in turbulent times, with the solar flux index going up and down, and geomagnetic conditions subject to fluctuations as coronal holes and coronal mass ejections come […]
Propagation News – 19 December 2021
After a period with zero sunspots we’re pleased to announce that the drought is over. There are now at least five active groups on the solar surface and this could even increase over the coming days. The solar flux index had leapt up to 103 from 89 on Thursday and could go even higher. This […]
Propagation News – 12 December 2021
The predicted elevated Kp index that we talked about last week didn’t amount to much at the end of the day. The solar wind remained reasonably calm and the Kp index only peaked at three. This rapidly fell to one by Tuesday and stayed at one or two for the rest of the week. Solar […]
