RSSGB2RS Propagation News

Propagation News – 19 April 2015

| April 17, 2015

The last week saw some very unsettled conditions in terms of geomagnetic disturbances, just as we predicted. The 14th, 15th and 16th were particularly bad, with the planetary K index hitting five and the solar wind speed exceeding 600 kilometres per second, sparking reports of visible aurora. The solar flux index leapt up to 155 […]

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Propagation News – 12 April 2015

| April 10, 2015

Last week we said that the sun was virtually clear, but spots have a habit of popping up from nowhere. This is exactly what did happen, pushing the solar flux index to a high of 126. Geomagnetic conditions were relatively settled, helping to improve HF propagation. This high declined as the week went on and […]

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Propagation News – 5 April 2015

| April 2, 2015

First, as we are now into April, please ensure that you are using the correct smoothed sunspot number of 61 with your VOACAP-based propagation programs. Over the past week the solar flux index continued in the range 120-130. The prediction for the coming week is for ‘more of the same’, with the SFI around 135-145. […]

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Propagation News – 29 March 2015

| March 27, 2015

Last week’s solar eclipse was a great opportunity to try out some propagation experiments. Many listeners reported the enhanced reception of distant medium wave stations at the time of maximum eclipse as the D layer of the ionosphere became less absorbing. The other data are currently being analysed for a feature in RadCom. This week […]

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Propagation News – 22 March 2015

| March 20, 2015

Last week we warned you of more potential solar flares and coronal mass ejections hitting the Earth and it looks like we were right. On Tuesday 17th a major geomagnetic storm took place, pushing the Kp index to eight. The immediate reaction was an increase in signal levels on 10m with many Swedish, Finnish and […]

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Propagation News – 15 March 2015

| March 13, 2015

Last week we said that the sun’s surface was looking a little bare, but that was before sunspot region 2297 erupted. This new area has helped keep the solar flux index around 120-130, but has spawned a number of solar flares. This region has so far produced an X2.2 flare, along with four moderate M-class […]

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