GB2RS Propagation News
Propagation News – 22 September 2024
It was a topsy-turvy time for HF propagation last week with a declining solar flux index and geomagnetic disturbances thanks to coronal mass ejections (CMEs) from the Sun. The solar flux index declined to the mid-160s, and the Kp index had a couple of excursions to more than 7. These were due to CMEs and […]
Propagation News – 15 September 2024
Last week showed that HF conditions are improving as we head into the autumn. With a solar flux index still above 200, there was plenty of DX available to work. CDXC members reported working VP6WR on the Pitcairn Islands, KH8T on American Samoa and 3D2USU on Fiji, which is not a bad catch for early […]
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 […]
