GB2RS Propagation News
Propagation News – 2 November 2025
Last weekend saw HF shine as stations took part in the CQ World Wide SSB Contest. Geomagnetic conditions remained settled and DX was plentiful, with contacts possible as far afield as Alaska to the west and China to the east. Given the unsettled conditions we have had recently, it was a welcome break as radio […]
Propagation News – 26 October 2025
It looks like Earth dodged a bullet last week when a large coronal mass ejection, or CME, erupted on the far side of the Sun on Tuesday, 21 October. Had that CME been Earth-directed we could have endured a strong, or possibly an extreme, geomagnetic storm with dazzling displays of aurora. The source of the […]
Propagation News – 19 October 2025
Conditions over the past week have been reasonable with a relatively high solar flux and lower Kp indices. This resulted in a maximum usable frequency (MUF) over a 3,000km path, in excess of 35MHz. This is just what October was meant to be like! But all good things come to an end, and there are […]
Propagation News – 12 October 2025
We finally got rid of the high-speed solar wind stream, which caused havoc on the HF bands. But we are not out of the woods yet! Last week saw the Kp index hit 6.67 on 2 October, and it was often up around 4 or more. Even though the Kp index eventually reduced, the ionosphere […]
Propagation News – 5 October 2025
Last week was characterised by very unsettled geomagnetic conditions with a Kp index that reached 7.33 on 30 September and was often above 5. This is not good for HF propagation! But what caused this? A high-speed solar wind stream at around 750 kilometres per second, coupled with the Bz component of the Sun’s magnetic […]
Propagation News – 28 September 2025
Last week was good for HF propagation for a number of reasons. Firstly, we are now entering autumn, which offers better propagation prospects than summer. Secondly, the solar flux index has remained high at up to 184 as of last Thursday 25 September. We had a week of near-normal geomagnetic conditions, with a low Kp […]
