GB2RS Propagation News
Propagation News – 9 July 2023
NOAA’s prediction that the Solar Flux Index, or SFI, would decline last week didn’t come to fruition. In fact, the SFI stayed in the 160s and 170s until Thursday, when it declined to 155. The Sun produced more than 160 sunspots in June, the highest monthly number in more than two decades. This has led […]
Propagation News – 2 July 2023
The solar flux index stayed in the 150s and 160s last week, which is good news for HF propagation. From a flare and CME perspective, we have been lucky in that we have only had a few solar flares, all of which have been C- or M-class. As a result, the Kp index has remained […]
Propagation News – 25 June 2023
We had yet another week of high solar flux, plenty of sunspots, but also a major solar flare. The solar flux index reached 180 on 20 June 2023 with a massive spread of sunspots across both solar hemispheres. But an X-class solar flare erupted on the same day. This was only just X-class though, as […]
Propagation News – 18 June 2023
We had another week of sound HF propagation, helped by relatively quiet geomagnetic conditions, a lack of bad solar flares, and some good multi-hop Sporadic-E openings. The Kp index never rose above three and was mostly ones and twos. This was no doubt helped by no M-class or higher solar flares and no Earth-directed coronal […]
Propagation News – 11 June 2023
Solar activity has remained at low levels over the past few days with only minor C-class and one M-class flare detected. The majority of these small flares were produced by active region 3327 in the southeast quadrant. But a large number of sunspots means we are at a high risk of M-class or even higher […]
Propagation News – 4 June 2023
We had a relatively calm period last week with the Kp index remaining below three and plenty of sunspots. Although we started the week with the Solar Flux Index in the low 150s, it quickly picked up to reach 161 by Thursday. As a result, there was DX to be had, although most of the […]
