GB2RS Propagation News
Propagation News – 12 February 2017
Last week, the hoped-for settled geomagnetic conditions materialised, but could have been better. After Monday, the K-index settled down to one or two for the rest of the week. HF conditions have been variable, rather than outstanding. There have been some 15 metre openings at times, but 20 and 17 metres have been more consistent. […]
Propagation News – 5 February 2017
Last week’s prediction about geomagnetically-disturbed conditions turned out to be correct, with the K-index soaring to five during the week. This resulted in visible aurora at high latitudes, as local midnight is often the time when aurorae and disturbed conditions hit their peak. There were three small sunspot groups visible on the solar surface on […]
Propagation News – 29 January 2017
Last week saw a flurry of sunspots appear that pushed the solar flux index to 87 on the 22nd. Geomagnetic conditions were unsettled last weekend, but this week has largely seen a respite, with the K-index often being one or even zero. This resulted in good conditions with the maximum useable frequency hitting at least […]
Propagation News – 22 January 2017
We saw a couple of sunspots last week, but they weren’t enough to make a major difference to HF propagation. This was due in part to a raised K-index, thanks to solar material from a recurrent coronal hole. NOAA released a geomagnetic storm warning for the 18th and 19th. The solar index remained in the […]
Propagation News – 15 January 2017
The predicted poor geomagnetic conditions last week were not quite so bad, due to the incoming high speed stream from a coronal hole having a mostly north-facing Bz field. This was less likely to couple with the earth’s magnetic field and we didn’t see the very high K indices and poor auroral conditions we expected. […]
Propagation News – 8 January 2017
Firstly, a happy New Year to all. We’ve got off to a bad start with a massive coronal hole on the sun that has rewarded us with dire predictions for the period up to 8 January. We can expect the K-index to hit four or five at times with a consequent lowering of maximum useable […]
