GB2RS Propagation News
Propagation News – 10 March 2019
The Sun sprouted a new sunspot this week bringing the sunspot number to 17 and the solar flux index to 73. The sunspot number represents 10 for a group and one for each of the sunspots in that group. Geomagnetic conditions were more settled over the week, with the Kp index hitting one and two. […]
Propagation News – 3 March 2019
The settled Sun came to an abrupt end on Thursday when the Kp index rose to five as a result of an elongated coronal hole on its surface. This sparked high-latitude auroras. It brought to an end a period of settled conditions, with the Chilton ionosonde showing MUFs struggling to reach much above 14MHz on […]
Propagation News – 24 February 2019
The Sun played ball this week and matched our predictions. The Kp index soared to four on Thursday, the 21st, thanks to ongoing coronal hole activity, but it was otherwise settled. There had been good conditions earlier in the week. The ARRL International DX Contest gave people contacts into nearly all the US states over […]
Propagation News – 17 February 2019
We had another spotless week as the Sun continued its decline into solar minimum. Geomagnetic conditions were varied with the beginning of week seeing the Kp index hitting one and two. But this didn’t last due to ongoing coronal hole activity, which saw the Kp index climb to three and four by Wednesday, the 13th, […]
Propagation News – 10 February 2019
Matter from a solar coronal hole pushed the Kp index to five in the early hours of Friday, the 1st, eventually resulting in much reduced maximum usable frequencies as the ionosphere was depleted. Signals on Saturday, the 2nd, were noticeably poorer, with even 14MHz struggling. There were also reports of very visible aurora around the […]
Propagation News – 3 February 2019
Last week was a mixed bag in terms of HF propagation. The solar flux index was a little higher at 74, helped by a sunspot group that has now rotated out of view. Geomagnetic conditions were very settled in the first half of the week with the Kp index often sitting at zero. It seems […]
