GB2RS Propagation News
Propagation News – 8 September 2024
Last week was underlined by continued high solar flux indices and excellent 10m band propagation to CY9C on Saint Paul Island near Newfoundland. The DXpedition, which has now ended, was often at S9+ on 28MHz up to two hours after sunset. This may be a sign that better autumnal HF conditions are just around the […]
Propagation News – 1 September 2024
We had a good week for HF propagation, at least until we had a Kp index of 5.67 on Wednesday, the 28th. This was caused by the Bz component of the interplanetary magnetic field moving into a south-pointing position. Luckily, it didn’t last long and geomagnetic conditions were back to normal by Thursday. The solar […]
Propagation News – 25 August 2024
We had yet another week with a high solar flux and relatively calm geomagnetic conditions. The solar flux index ended up at 239 on Thursday 22 August, while the Kp index has been below 4 since Sunday 18 August. There are currently 11 active sunspot regions on the Sun’s surface and there is a 20% […]
Propagation News – 18 August 2024
Last week was notable for its auroral activity, high solar flux index and variable HF conditions. Monday 12 August saw the Kp index rise to 7 as coronal mass ejection material struck the Earth, sparking visible aurora as far south as Cornwall. But by lunchtime on Tuesday things were back to normal with a Kp […]
Propagation News – 11 August 2024
Well, so much for the experts! NOAA predicted that the solar flux index would fall last week, when it actually increased to a whopping 303 on Thursday 8 August. But this high solar flux number was accompanied by a strong risk of solar flares, so it was not all plain sailing. We have had 15 […]
Propagation News – 4 August 2024
We had another week of high solar flux but unsettled geomagnetic indices. The solar flux index, or SFI, was above 200 from the 27 July onwards. There was a worry that multiple coronal mass ejections, or CMEs, might push the Kp index up during the week. In the end, the Kp index didn’t rise above […]
