GB2RS Propagation News
Propagation News – 31 May 2026
Compiled by G0KYA, G3YLA and G4BAO on Thursday, 28 May. What a difference a week can make… Last week we reported that the solar flux index was down in the 100s but that it looked like there were spots coming around the Sun. This week they’ve arrived, pushing the solar flux index up to 142 […]
Propagation News – 24 May 2026
Compiled by G0KYA, G3YLA and G4BAO on 21 May. Last weekend’s geomagnetic disturbance didn’t turn out to be quite as bad as predicted. A high-speed solar wind stream from a massive coronal hole and a coronal mass ejection caused the Kp index to rise to 6.33 on Friday, 15 May but it subsided and we […]
Propagation News – 17 May 2026
Compiled by G0KYA, G3YLA and G4BAO on 14 May We hate to start the report on a negative note but we are about to experience unsettled geomagnetic conditions over the next few days. The culprit is a large coronal hole on the Sun, which rotated into an Earth-facing position on Thursday, 14 May. This large […]
Propagation News – 10 May 2026
Compiled by G0KYA, G3YLA and G4BAO on Thursday, 7 May 2026 We had another mixed week of HF propagation, with a Kp index of 6 one day and then three days later a Kp of less than 1. The index hit 6.33 on the evening of Monday, 4 May, sparking aurora and poor HF conditions. […]
Propagation News – 3 May 2026
Compiled by G0KYA, G3YLA and G4BAO on 30 April. Last week was about as good as it gets at this point in the solar cycle. We had a solar flux index in the 140s and a Kp index that was pretty flat, often below 2. That’s good news for HF as it means the ionosphere […]
Propagation News – 26 April 2026
Compiled by G0KYA, G3YLA and G4BAO on 23 April, 2026 Last week’s HF propagation was dominated by the effects of a high-speed stream from a large coronal hole on the Sun. This pushed the Kp index up to 4 and 5 at times with the result that maximum usable frequencies, or MUFs, were lowered. The […]
