RSSGB2RS Propagation News

Propagation News – 20 December 2015

| December 18, 2015

The smoothed sunspot number for December is 46.1. This time last year it was 63.7, which shows how we are sliding down solar cycle 24. Coronal mass ejections and coronal holes continue to cause problems at times, with the K-index hitting five on Tuesday the 15th. As the incoming plasma hits the earth you can […]

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Propagation News – 13 December 2015

| December 11, 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 […]

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Propagation News – 6 December 2015

| December 4, 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 […]

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Propagation News – 29 November 2015

| November 27, 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 […]

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Propagation News – 22 November 2015

| November 20, 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 […]

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Propagation News – 15 November 2015

| November 13, 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 […]

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