RSSGB2RS Propagation News

Propagation News – 30 August 2015

| August 28, 2015

The predicted drop in the solar wind failed to materialise this week as it is still being driven by coronal holes on the sun. These are areas of weaker magnetic fields that let plasma escape from the sun’s surface. The Kp index has hit six at times, bringing very unsettled geomagnetic storm conditions and poor […]

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Propagation News – 23 August 2015

| August 21, 2015

HF propagation conditions were very bad earlier this week. The culprit was a high-speed solar wind stream from coronal holes on the sun. The solar wind often exceeded 500 kilometres per second and had a south-facing Bz field at times. This meant that it more easily coupled with the Earth’s magnetic field – and plasma […]

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Propagation News – 16 August 2015

| August 14, 2015

Long-range HF propagation showed signs of picking up this week. Whether this was due to the slow change to better autumnal propagation, or from having a short period of fairly settled geomagnetic conditions, is debatable. The settled conditions didn’t last long though as the Kp index was up to four on Thursday due to plasma […]

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Propagation News – 9 August 2015

| August 7, 2015

Further complaints about poor HF conditions were heard this week as the summer doldrums continued, not helped by a less than brilliant solar flux index of about 105. Having said that, the sun is showing more activity with a sprinkling of spots. Geomagnetic conditions were on the whole settled this week, at least until Thursday […]

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Propagation News – 2 August 2015

| July 31, 2015

HF propagation conditions during last weekend’s IOTA contest were pretty dire. This was due to a perfect storm of typical summer conditions, a fairly low sunspot count and poor geomagnetic conditions, reflected in a Kp index of three. This was due to the arrival of material from a coronal mass ejection and the onset of […]

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Propagation News – 26 July 2015

| July 24, 2015

This week had seen reasonably settled conditions until the geomagnetic Kp index hit five on Thursday 23rd, thanks to a glancing blow from a solar coronal mass ejection. The solar flux index fell below 100 as well. If we look at the smoothed solar flux and sunspot data we can see we are now exiting […]

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