GB2RS Propagation News
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 […]
Propagation News – 13 November 2022
Last week was a mixed bag in terms of space weather. Yes, the solar flux index increased to 138 by Thursday 10 November, but at the same time we had a fast solar wind and a solar flare from active region AR 3141 to contend with. The Kp index hit five on Monday 7 November […]
Propagation News – 06 November 2022
We had yet another week of good HF propagation, despite a strong solar wind that threatened to push the geomagnetic Kp index up, but it generally never managed more than a four in the first half of the week. The solar flux index managed to hit 130 on Thursday, having been in the 120s all […]
Propagation News – 30 October 2022
Good conditions on HF have continued with only a short geomagnetic disturbance to dull things a little. The planetary Kp index got up to five on the 25th, due to plasma from a geo-effective coronal hole, but luckily it recovered quite quickly. Two days later it was back to one and the upper HF bands […]
