GB2RS Propagation News
Propagation News – 24 March 2024
As we said last week—what a difference a month makes. Only in this case, what a difference a week makes! On Friday, the 15th, the solar flux index, or SFI, was at 129 and the Sun did not look very spotty at all. This week it’s all changed. On Thursday, the 21st, the solar flux […]
Propagation News – 17 March 2024
What a difference a month makes. We’ve gone from a solar flux index up to almost 200, to one that is down in the 120s. Over the past week, we have had only two M-class solar flares, which means we have had limited coronal mass ejection activity and therefore low Kp indices. Last weekend’s Commonwealth […]
Propagation News – 10 March 2024
As predicted, a coronal mass ejection, or CME for short, affected the ionosphere last weekend, the 2 and 3 of March, pushing maximum usable frequencies down and sparking auroral displays that were visible as far south as Cornwall. The plasma hit the Earth around midday on Sunday the 3 March, eventually pushing the Kp index […]
Propagation News – 3 March 2024
Active region 3590, which was the large sunspot group that threatened us with solar flares and coronal mass ejections, or CMEs, has now moved to the Sun’s limb and is no longer a threat. Region 3590 was potentially dangerous, but ultimately wasn’t too bad. Yes, we had flares, but they were only minor C-class and […]
Propagation News – 25 February 2024
We’ve had two X-class solar flares over the past few days. The first occurred at 2307UTC on 21 February, so didn’t affect the UK at all. The second erupted at 0632UTC on 22 February and was too early to affect the ionosphere in this region. However, HF paths to the east may have been affected. […]
Propagation News – 18 February 2024
We had an interesting week with the threat of a major coronal mass ejection at any time with so much sunspot activity. In the end, it pretty much amounted to nothing, with the highest Kp index only reaching 4.33 on 11 February. That’s not to say we didn’t have solar activity. Far from it, as […]
