RSSGB2RS Propagation News

Propagation News – 6 August 2017

| August 4, 2017

Last week was characterised by reasonably settled geomagnetic conditions and a solar flux index in the low 70s. The settled conditions meant that, despite the ionosphere still suffering from the summer doldrums, there was HF DX to be had. Andy, M0NKR reports working Z81D South Sudan and TX5EG Marquesas Island on Monday as well as […]

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Propagation News – 30 July 2017

| July 28, 2017

For most of last week there were no sunspots on the Earth-facing solar disc. A single small sunspot, number 2668, appeared on Tuesday, but had gone by Wednesday. Solar activity was very low and flux stayed at 69 and 70 all week. The K-index however was mainly at 3 and 4, and only briefly dropped […]

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Propagation News – 23 July 2017

| July 21, 2017

Last week, space weather was dominated by sunspot number 2665 that was twenty times larger than any recent sunspot—the largest since number 2529 in April 2016. It disappeared on Wednesday as the Sun’s rotation took it out of our view. Solar flux held at 92 before fading back to the low seventies. Conditions were unsettled […]

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Propagation News – 16 July 2017

| July 14, 2017

Sunspot number 2665 caught NOAA by surprise last week. As we wrote in the last report it was only just rotating into view, but ultimately turned out to be very large indeed. It helped push the solar flux index up to 91 during the week, although it was the only sunspot group visible. We got […]

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Propagation News – 9 July 2017

| July 7, 2017

Earlier last week the sun’s surface looked clear. There were no sunspots at all and the solar flux index remained in the low 70s. However, settled geomagnetic conditions helped make up for this with the K-index often at zero. Daytime D-layer absorption didn’t really help with the summer HF doldrums, but there were highlights in […]

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Propagation News – 2 July 2017

| June 30, 2017

This week NASA confirmed that we are heading for solar minimum, with the low point expected in 2019-2020. It also said that this may bring more long-lived coronal hole activity. This should come as no surprise to radio amateurs as we have been reporting near-minimum solar flux index levels and the ongoing effects of coronal […]

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