GB2RS Propagation News
Propagation News – 3 October 2021
Life is starting to get a bit more interesting in terms of the Sun and HF propagation. This week we have seen more sunspots, a coronal mass ejection and some minor solar flares, so the Sun is definitely waking up. The solar flux index passed 100 on Thursday, reaching 102. This is high enough to […]
Propagation News – 26 September 2021
This week saw the Sun more active with up to five sunspot regions in place. Two of the regions are quite large, pushing the solar flux index up to 89 on Thursday with a sunspot number of 76. That should be enough to get the ionosphere up and running and we are also seeing early […]
Propagation News – 19 September 2021
After last week’s very active Sun, we have had a quieter week with little solar activity. As of Thursday, there were zero sunspots and the solar flux index had declined to 75, pretty much as predicted. The upside is that the Sun has been quiet geomagnetically with a maximum Kp index of three over the […]
Propagation News – 12 September 2021
What a difference a week makes! Last week we were looking at a virtually spotless Sun and we said that NOAA predicted the SFI would decline into the low 80s. But this week we have had an explosion of sunspot activity. As a result, the SFI has gone up to 100 with a sunspot number […]
Propagation News – 5 September 2021
Well, NOAA got the solar flux index prediction wrong last week. The SFI actually ended up higher than the prediction, thanks to active region 2860, which grew as the week went on. NOAA also issued a G1, or Minor, and G2, or Moderate, geomagnetic storm watch for the 1st and 2nd of September, just days […]
Propagation News – 29 August 2021
We had another week with a quiet Sun, but it wasn’t as settled as you might think. Yes, the solar flux index was in the low- to-mid-80s, but the Sun started to get very active. The first event on Sunday saw a prominence eruption off the west limb that flung a coronal mass ejection, or […]
