GB2RS Propagation News
Propagation News – 2 February 2025
Last week was pretty unremarkable as far as the Sun goes, but it looks like that is about to change. The seven days preceding Thursday 30 January were characterised by reasonably settled geomagnetic conditions, with a maximum Kp index of 3.67 and a solar flux index that fell from 205 on the 24 January, to […]
Propagation News – 26 January 2025
This week, ending Sunday 26 January, has looked a lot like a repeat performance of two weeks ago. The majority of the sunspots are in the western hemisphere with very few in the eastern side. This means that the solar flux index could drop over the coming week unless there are sunspots ready to rotate […]
Propagation News – 19 January 2025
It looks like the lull in sunspot activity is coming to an end as the solar flux index rose to 174 on Thursday 16 January, after a week in the 150s and 160s. The Sun was fairly bare, but there are now signs of more sunspot activity rotating into view. There have been no X-class […]
Propagation News – 12 January 2025
First, let’s take a look at last week’s solar activity. As predicted, the solar flux index declined to the 160s. We had one X-class solar flare on the 4 January and there have been 11 M-class flares since then. The net result was that the ionosphere was unsettled from the 4 to the 6 January […]
Propagation News – 5 January 2025
We started the new year with a bang, or more precisely a Kp index of 8 and widespread visible aurora. This was caused by a partial halo coronal mass ejection, associated with an eruption in the Sun’s southeast quadrant on the 29 December. The strong G3 to severe G4 geomagnetic storm peaked at about 1800UTC […]
Propagation News – 22 December 2024
The last week was a little more disturbed than usual and we had a Kp index that hit 5.33. An enhanced solar wind stream contributed to active geomagnetic conditions and an interplanetary shockwave, that swept past Earth at 0519UTC on the 17 December, caused minor G1 geomagnetic storming. A far-sided halo coronal mass ejection event […]
