Compiled by G0KYA, G3YLA and G4BAO on 10 September 2026. As we head into September, autumnal HF conditions are fast approaching. We can expect the maximum useable frequency, or MUF, to climb during the day and DX to become more plentiful. However, we are not there yet and it may take a few more weeks […]

Compiled by G0KYA, G3YLA and G4BAO on 3 September 2026. Solar activity has continued to decline, leaving us with a solar flux index around 100. The upside is we haven’t had any solar flares and associated coronal mass ejections, or CMEs, to contend with. Over the last week, we had only one M-class flare and […]

Compiled by G0KYA, G3YLA and G4BAO on 27 August 2026. Last week, we said there were no coronal holes to threaten HF propagation. However, guess what appeared just after the time of writing… Coronal holes can appear at any time, which is why we recommend going to solarham.com  for daily updates. This week, another coronal […]

Compiled by G0KYA, G3YLA and G4BAO on 20 August, 2026 Last week was characterised by geomagnetic disturbances, due to high-speed solar wind streams from coronal holes and a slightly increasing solar flux index. The Kp index hit 5 on 18-19 August reducing maximum useable frequencies, or MUFs, and generally being detrimental to HF propagation. We also […]