We had a quiet week geomagnetically, but the solar flux has also declined. Over the past week, the Kp index never rose above 2 or 3, with only one three-hour excursion to 5 on Thursday 11 June. This bodes well for HF propagation, but the solar flux index has declined from its recent high of […]

Last week we warned you about a potential geomagnetic disturbance caused by a triple coronal mass ejection, or CME, from the Sun. As it turned out, the Kp index rose to 6.33 and poor HF conditions ensued, just in time for RSGB National Field Day. Luckily, Sunday 7 June wasn’t quite so bad, but it did […]

Compiled by G0KYA, G3YLA and G4BAO on 4 June. We are awaiting the arrival of solar material as a result of three coronal mass ejections, or CMEs, that erupted off the Sun. These were sparked by three solar flares. These, coupled with a high-speed solar wind stream from an Earth-facing coronal hole, threaten to initiate a […]

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 […]