RSSGB2RS Propagation News

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 […]

Continue Reading

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 […]

Continue Reading

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 […]

Continue Reading

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 […]

Continue Reading

Propagation News – 25 June 2017

| June 23, 2017

Last week the solar flux index remained steadfastly in the mid-70s. There was only one very minor S class solar flare, on Sunday, 18 June. As predicted, geomagnetic conditions were unsettled on the Sunday, but improved as the week went on. During a week when we had the solar solstice, HF conditions were subdued. This […]

Continue Reading

Propagation News – 18 June 2017

| June 16, 2017

Last week, the solar flux index stayed steadfastly in the mid-70s. After Sunday the 11th, geomagnetic conditions were also reasonably settled, with the K-index mainly around one or two. The big HF news this week has been the ongoing sporadic E openings. These have affected all the HF bands, but are particularly noticeable on 10 […]

Continue Reading