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RSGB PROPOGATION:

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Propagation News – 31 August 2025Fri 29th Aug 2025 12:39 BST

This week saw a change in HF propagation with a perceptible move towards more autumnal conditions. The 10 and 12m bands have started opening up to the USA, at least on FT8. As we move into September this will improve further. Also, as we head towards the autumnal equinox, we can expect better conditions on […]

Propagation News – 24 August 2025Fri 22nd Aug 2025 11:55 BST

Last week was relatively good from an HF propagation standpoint, with only a few periods with an elevated Kp index thanks to a high-speed solar wind stream from a coronal hole. The Kp index hit 4.67 on the 19 August and 4 again on the 20 August due to the solar wind hitting earth at […]

Propagation News – 17 August 2025Fri 15th Aug 2025 13:18 BST

Last weekend was characterised by unsettled geomagnetic conditions caused by a massive coronal hole on the Sun. At one point, the Kp index got up to 6, with a corresponding decrease in maximum usable frequencies, or MUFs. In fact, the Dourbes Digisonde failed to record much at all over a six-hour period. Luckily, that disruption […]

Propagation News – 10 August 2025Fri 8th Aug 2025 14:50 BST

Over the last week we had nearly ideal solar conditions for HF propagation. These included low geomagnetic indices and a reasonable solar flux index, hovering around the 150 mark. Other solar events of note included six M-class solar flares. The only stumbling block is the time of year, with summer seeing lower maximum usable frequencies, […]

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