GB2RS Propagation News
Propagation News – 25 December 2022
The solar flux index stayed around 150 over the last week, bringing some choice DX to the higher HF bands. However, solar flares continue to plague us, bringing short-lived band fade-outs at times. These have all been moderate C and M-class flares. It is uncertain as to whether or not there will be an X-class […]
Propagation News – 18 December 2022
Things hotted up last week with a healthy increase in sunspot activity. The number of sunspots ramped up, giving us a solar flux index of 165 by Thursday. The other upside was the fact that geomagnetic conditions were quite settled with the Kp index remaining between one and three all week. There were some downsides. […]
Propagation News – 11 December 2022
There’s an old Chinese curse that says: “May you live in interesting times”. Well, the last week has been very interesting from an HF propagation perspective! The solar flux index increased from 111 on 30 November, to 148 on Thursday, the 8th. During that time, we had more than 50 C-class solar flares and two […]
Propagation News – 4 December 2022
Last week was characterised by unsettled geomagnetic conditions that had not been forecast. The Kp index fluctuated between three and five nearly all week, resulting in reduced HF propagation, especially over polar paths. The solar wind just refused to abate with speeds over 600km/s being commonplace. A southward-facing Bz interplanetary magnetic field just added to […]
Propagation News – 27 November 2022
We dodged a bullet last week when a large coronal hole failed to produce a geomagnetic disturbance. Despite many predictions that we could expect an upturn in the Kp index, it looks like the solar wind missed the Earth, probably because the hole was too low in the Sun’s southern hemisphere. As a result the […]
Propagation News – 20 November 2022
The good HF conditions continued last week with a low Kp index and a reasonable solar flux. But is that all about to change? The problem is a large coronal hole in the Sun’s southern hemisphere, which became geoeffective on Thursday. The hole is at mid-latitude, so is not completely in line with Earth. But […]
