GB2RS Propagation News
Propagation News – 15 November 2015
We’ve had another week of disrupted HF conditions, thanks to an ongoing high-speed solar wind stream. The K-index hit six on the 10th and five on the 11th showing severe geomagnetic storming. The maximum usable frequency over a 3,000km path has yo-yoed this week, being as low as 19.7MHz at noon on Tuesday, but hitting […]
Propagation News – 8 November 2015
This week saw a perfect example of how the sun affects HF propagation. As we predicted last week, a high-speed solar wind stream hit the earth on Tuesday. This pushed the K-index to five as the incoming plasma had a south-facing Bz field that enabled it to more easily couple to the Earth’s magnetic field. […]
Propagation News – 1 November 2015
It has been another week with great HF conditions. Last weekend gave many people the chance to work DX on 10 metres in the CQ Worldwide contest. The solar flux index stayed above 110 and geomagnetic conditions were generally quiet, especially compared with the problems we had with high speed solar wind streams last month. […]
Propagation News – 25 October 2015
This week has shown just how good the upper HF bands can be. A healthy solar flux index of 120 or more, plus settled geomagnetic conditions, has seen maximum usable frequencies rise to more than 30MHz. As a result, a lot of DX has been heard and worked, especially on 10 and 12m. This weekend […]
Propagation News – 18 October 2015
We’ve had another week of unsettled HF conditions. Geomagnetic storming was observed on Monday at high latitudes as a high-speed solar wind stream, flowing from a geo-effective coronal hole, caused problems. By Wednesday the Kp index peaked at five and the bands were left noisy with only fairly local European stations audible on 40-20m. The […]
Propagation News – 11 October 2015
The sun severely disrupted the HF bands again this week. A high-speed solar wind stream with a south-facing Bz magnetic component continued to interact strongly with the Earth’s geomagnetic field. Strong, G3 level geomagnetic storming was observed at high latitudes and the K index hit seven on Wednesday evening. There were long periods on Wednesday […]
