GB2RS Propagation News
Propagation News – 5 May 2024
What a strange week we had; with the solar flux index in the 167 range, falling to 130, conditions should have been reasonable, but the Kp index hit 4 and even 5.33 on the evening of Friday 26 April, which meant propagation on Saturday the 27th was truly dire. Stations taking part in International Marconi […]
Propagation News – 28 April 2024
We had another week with plenty of sunspots, and HF conditions were quite good in the second half. Earlier, the Kp index reached 3 and 4, which didn’t help maximum useable frequencies, or MUFs for short. For example, on Sunday the 21st, the Kp index rose to 4 and the MUF over a 3,000km path […]
Propagation News – 21 April 2024
Last week saw a welcome return of sunspots but, unfortunately, it also brought unsettled geomagnetic conditions. By Thursday 18 April the solar flux index was back above 200, hitting 217. Compare that to the previous week’s 131 and you can see that there is a lot more activity. But, with 12 active regions visible, it […]
Propagation News – 14 April 2024
The Sun is still looking a little bare, but the solar flux index has climbed back to 131, as of Thursday 11 April, with four active regions. The promise is that things will improve, especially as we will soon see the return of active region 3615, which was the source of numerous M-class and one […]
Propagation News – 7 April 2024
Looking at the Sun on Wednesday 3 April, you might be forgiven for thinking we are near sunspot minimum! With a near-total lack of sunspots and a solar flux index of 112, the solar disk was looking pretty bare. Compare that with just two weeks ago when the solar flux index was sitting at 209 […]
Propagation News – 31 March 2024
What a tumultuous time we had last week. Active region 3614 produced an X1.1 solar flare and coronal mass ejection, or CME, in the early hours of the 23 March. This impacted Earth’s geomagnetic field sending the Kp index to 8 on the 24 March. In fact, there were simultaneous flares from active region 3614 […]
