GB2RS Propagation News
Propagation News – 2 August 2020
The Sun showed signs of coming back to life this week with not one, but two, sunspot groups. The sunspot number climbed to 22, representing two spots in two separate groups, and the solar flux index rose to 73. This wasn’t really enough to make much of a difference to HF propagation though, but it […]
Propagation News – 26 July 2020
We had quite a quiet week with the Sun with zero sunspots and a settled geomagnetic field. The solar wind speed was slow, between 280 and 330km per second, and its magnetic field was weak, with no significant negative deflections in its important north-south Bz direction. Therefore, the resultant geomagnetic activity was settled. On the […]
Propagation News – 19 July 2020
Last week a coronal mass ejection caught space weather experts by surprise, sending the Kp index up to four for around nine hours on Tuesday. The stream had a strong southward component in its Bz field, which meant it could more easily couple with the Earth’s magnetic field. The weak CME passage was enough to […]
Propagation News – 12 July 2020
An elevated solar wind stream moved past Earth late on 4 July and early on the 5th, sending the Kp index to three. This was the most significant solar event of the last week as otherwise the Sun remained calm. The Kp index remained at one or zero for the rest of the week, which […]
Propagation News – 5 July 2020
This week saw the beginning of a new month and continued sporadic E openings. Traditionally we see a slow down in the number of sporadic E openings in July, but while we are seeing a few periods on 10m when there are no openings, they inevitably reappear. An HF F2-layer opening to Angola occurred on […]
Propagation News – 28 June 2020
After the recent excitement of a new Solar Cycle 25 sunspot, it seems the Sun has decided to go back to sleep. We have had zero sunspots since 16 June and the STEREO spacecraft Ahead view shows just one small bright area on the Sun, which might result in a spot in due course. Luckily, […]
