GB2RS Propagation News
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 […]
Propagation News – 15 December 2024
We had another week with quiet geomagnetic conditions. Other than a three-hour period with a Kp of four on the 9 December, as of last Thursday when this report was being compiled it had been below three for the past seven days. Active region 3920 produced an impulsive M2.8 solar flare, peaking at 1006UTC on […]
Propagation News – 8 December 2024
We had another week of high solar activity but limited geomagnetic disturbances. This meant that the upper HF bands were playing ball all week. The Kp index only exceeded four on one occasion, on the 30 November when it hit 4.67, but otherwise it has been low. And with a solar flux index mainly in […]
Propagation News – 1 December 2024
Last weekend’s CQWW CW contest was a reminder of just how good HF propagation can be near sunspot maximum. The whole world was workable on the contest bands up to 10 metres, including the Far East, Australasia, the Caribbean and South America. It was a great opportunity to increase your DXCC total and have fun […]
Propagation News – 24 November 2024
We’ve had yet another week of relatively calm geomagnetic conditions. The solar flux index has been in the 160s and despite having 14 M-class solar flares over seven days, we haven’t had any coronal mass ejections to contend with. As a result, the daytime maximum usable frequency, or MUF, over a 3,000km path has been […]
