RSSGB2RS Propagation News

Propagation News – 16 June 2019

| June 14, 2019

We had another quite settled week. The Kp index rose to four on the 8th thanks to a glancing blow from an earlier coronal mass ejection. It rose to three again on Thursday the 13th due to an enhanced solar wind stream. The solar flux index remained around 70 thanks to a total lack of […]

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Propagation News – 9 June 2019

| June 7, 2019

We had a very quiet, settled Sun last week. The solar flux index never got above 70, reflecting a complete lack of sunspots, while the Kp index eventually decreased to one or two, due to a lack of coronal holes on the solar surface. The net result was that HF conditions were not bad, but […]

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Propagation News – 2 June 2019

| May 31, 2019

A couple of small Earth-facing coronal holes were the source of an elevated solar wind stream that pushed the Kp index to four on Wednesday. Otherwise solar conditions were generally quite flat last week. This helped sporadic E production, which saw 10 metres come alive, with the band sounding more like 20 metres on a […]

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Propagation News – 26 May 2019

| May 24, 2019

Geomagnetic conditions have been much quieter over the last week as the result of reduced coronal hole activity and a lack of coronal mass ejections. The solar surface is now devoid of sunspots, so we are back to settled conditions. Many listeners are reporting that 20 metres is staying open longer at night. This is […]

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Propagation News – 19 May 2019

| May 17, 2019

Last week saw the Kp index rise to seven on Tuesday, thanks to an enhanced solar wind stream containing a sharply south-pointing Bz. This is the direction of the interplanetary magnetic field and south-pointing means it was more likely to couple with the Earth’s magnetic field. This was due to a number of filament eruptions […]

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Propagation News – 12 May 2019

| May 10, 2019

Sunspot group 2740 has now returned and is emitting a lot of radio noise. Solarweather.com reports large bursts have been recorded on 20 and 25MHz. The bursts sound like waves breaking on the shore and are caused by beams of electrons accelerated by explosions in the sunspot’s magnetic canopy. As the electrons slice through the […]

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