GB2RS Propagation News
Propagation News – 11 August 2024
Well, so much for the experts! NOAA predicted that the solar flux index would fall last week, when it actually increased to a whopping 303 on Thursday 8 August. But this high solar flux number was accompanied by a strong risk of solar flares, so it was not all plain sailing. We have had 15 […]
Propagation News – 4 August 2024
We had another week of high solar flux but unsettled geomagnetic indices. The solar flux index, or SFI, was above 200 from the 27 July onwards. There was a worry that multiple coronal mass ejections, or CMEs, might push the Kp index up during the week. In the end, the Kp index didn’t rise above […]
Propagation News – 28 July 2024
We had yet another week of high sunspot numbers and low geomagnetic disturbances, but will it last? We dodged a bullet last week after a weak coronal mass ejection, or CME, on Tuesday 23 August failed to generate a geomagnetic storm. This was from a faint halo CME observed on Sunday, which was much weaker […]
Propagation News – 21 July 2024
We had another great week in terms of HF propagation. The solar flux index was at a remarkable 224 on Thursday, the 18th, and the Kp index had been consistently in the ones and twos all week. It doesn’t get much better than this, HF-wise, although it’s a shame it’s not autumn with the associated […]
Propagation News –14 July 2024
We had another week of reasonably settled geomagnetic conditions and a high solar flux index. The solar flux index was at 214 on Thursday 11 July, while the Kp index has been around 2 to 3 all week. That’s generally good news for HF. However, a small coronal hole is now facing Earth and a […]
Propagation News – 7 July 2024
After a rough spot last weekend, the Sun has since behaved itself, allowing HF propagation to get back to normal. To recap, the Kp index hit 7.67 on Friday 28 June, thanks to incoming plasma from a coronal mass ejection. For a time, it looked like we might have a repeat performance of the 10 […]
