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Propagation News – 10 December 2017Fri 8th Dec 2017 15:08 GMT

Last week, the effects of the high-speed solar wind from another coronal hole saw the K-index climb to five on Tuesday and remain relatively high throughout Wednesday and Thursday. The ionosphere took a hit and daytime maximum usable frequencies struggled to exceed 18MHz at times. By Thursday, conditions were starting to improve a little, but […]

Propagation News – 3 December 2017Fri 1st Dec 2017 15:11 GMT

HF propagation for last week’s CQ Worldwide CW contest was fair to middling. There was a 10 metre opening on Saturday, but otherwise the money bands were 20 and 15 metres during the day, with 40 and 80 metres coming into their own after sunset. The predicted poorer geomagnetic conditions on Sunday didn’t really materialise, […]

Propagation News – 26 November 2017Fri 24th Nov 2017 15:43 GMT

The Solar Flux Index remained in the 70s last week, reflecting the continued absence of sunspots. Geomagnetic conditions were unsettled at the beginning of the week, but improved as the effects of a coronal hole passed. We were left with a mixed bag of HF propagation, with fair conditions at times and poorer ones at […]

Propagation News – 19 January 2017Fri 17th Nov 2017 15:19 GMT

Last week saw the solar flux index stay steadfastly in the mid-70s thanks to a lack of visible sunspots on the solar surface. But by Thursday one had appeared over the limb and was designated sunspot 2687. Geomagnetic conditions were mostly settled in the first half of the week, but a minor G1 geomagnetic storm […]

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