GB2RS Propagation News
Propagation News – 13 December 2015
This has been another week with an elevated solar wind stream from coronal holes. This had a negative effect on the geomagnetic field, which reached storm levels at times again with visible aurora at higher latitudes. The solar wind often had a south-facing magnetic Bz component, which meant it coupled more easily with the earth’s […]
Propagation News – 6 December 2015
Last weekend saw reasonably settled conditions for the CQ Worldwide contest, with DX to be had on all the upper HF bands. However, 10 metres was a little lacklustre this year due to the lower solar flux index compared with 2014. Twenty and 15 metres proved to be the ‘money bands’ as the flux dipped […]
Propagation News – 29 November 2015
This week has been geomagnetically quiet with the K-index hovering around zero or one. This is in contrast to the extremely unsettled conditions we have been having on and off over the past few months. Coupled with a solar flux index of around 110 to 120 this has brought reasonably settled conditions on HF and […]
Propagation News – 22 November 2015
This week has been a bit of a mixed bag in terms of HF propagation. The early part of the week saw reasonable openings on 18 and 21MHz, although a continuous K-index of around three due to the high speed solar wind stream, took its toll. The VK9WA Willis Island DXpedition was even audible on […]
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. […]
