RSSGB2RS Propagation News

Propagation News – 16 April 2017

| April 13, 2017

Last week was a mixed bag again in terms of HF propagation. While the solar flux index was stuck in the mid 70s, geomagnetic disturbances due to coronal hole effects made their mark. The K index hit four on Tuesday and brought a pre-auroral enhancement. With the critical frequency over the UK almost reaching 7MHz, […]

Continue Reading

Propagation News – 9 April 2017

| April 7, 2017

A large sunspot group pushed the solar flux index to 112 this week, which was largely unpredicted. However, unsettled geomagnetic conditions reigned again with the K index hitting five on the fourth. The activity from sunspot region 2644 also brought a number of solar flares, and it will be interesting to see if they reoccur […]

Continue Reading

Propagation News – 2 April 2017

| March 31, 2017

Last week was a mixed bag. As predicted we had geomagnetic storming, thanks to the effects of a large coronal hole and its associated high speed solar wind stream, but we also had some good HF conditions at times. With the solar flux in the low 80s, propagation was dominated by the impact of solar […]

Continue Reading

Propagation News – 26 March 2017

| March 24, 2017

Last week’s predicted geomagnetic storm materialised on cue, sending the K index up to five on Tuesday. The storming continued right through Wednesday into Thursday. There was an initial ionospheric enhancement late on Tuesday, but it didn’t last long. Maximum useable frequencies were then adversely affected on Wednesday with noisy bands and even 20 metres […]

Continue Reading

Propagation News – 19 March 2017

| March 17, 2017

Despite zero sunspots and a solar flux index of only 70, there was good DX to be had last week. This was helped by more settled geomagnetic conditions over a period of days, thanks to a lack of coronal hole activity. The RSGB Commonwealth Contest saw UK amateurs making contacts into all parts of the […]

Continue Reading

Propagation News – 12 March 2017

| March 10, 2017

In the last report we said the ongoing disturbed geomagnetic conditions may have settled, with a predicted K-index of two. Unfortunately, this didn’t happen as early as expected and the beginning of the week saw a K-index up as high as five. This had an adverse effect on maximum useable frequencies, with a very unsettled […]

Continue Reading