GB2RS Propagation News
Propagation News – 19 April 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 […]
Propagation News – 12 April 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 […]
Propagation News – 5 April 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. […]
Propagation News – 29 March 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 […]
Propagation News – 22 March 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 […]
Propagation News – 15 March 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 […]
