GB2RS Propagation News
Propagation News – 31 March 2019
Last week the predicted increased Kp index from a coronal hole didn’t amount to much. The coronal mass ejection from the Sun a few days earlier wasn’t quite Earth-facing so we dodged the bullet. Other than that, conditions have been quite settled with a maximum Kp index of three caused by an enhanced solar wind. […]
Propagation News – 24 March 2019
The Sun burst into life this week, with two new sunspots and solar flares aplenty. But before you get too excited the spots are from the outgoing solar cycle 24. Sunspot 2736 erupted on Wednesday with a C4-class solar flare. The Earth-directed explosion sent ionisation rippling through Earth’s upper atmosphere and caused a Dellinger fade-out […]
Propagation News – 17 March 2019
There is life in the old dog yet! The lone spotted region on the visible disk of the Sun managed to produce a minor C1.3 flare on 8 March. Although not a noteworthy event as far as peak X-ray strength, the flare was associated with an eruption and what appears to be a faint coronal […]
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 […]
