RSSGB2RS Propagation News

Propagation News – 14 October 2018

| October 12, 2018

Last week was not very good for HF propagation, with the effects of an enormous solar coronal hole, and its associated high-speed solar wind, sending the K-index soaring. There were, however, some upsides. The initial positive phase of a geomagnetic storm saw maximum useable frequencies rise to more than 21MHz during the afternoon and early […]

Continue Reading

Propagation News – 7 October 2018

| October 5, 2018

There are signs that ionospheric conditions are improving as we head into autumn. This isn’t unexpected; as the ionosphere cools there is a chemical shift towards more monatomic species that are easier to ionise. The 4U1UN New York, VE8AT Nunavut and ZS6DN Pretoria beacons on 14.100MHz were all audible at the same time on Wednesday, […]

Continue Reading

Propagation News – 30 September 2018

| September 28, 2018

At the risk of sounding very samey, the solar flux index remained at around 67-68 with zero sunspots this week, and just a few points off what we can expect at absolute solar minimum. As predicted, geomagnetic conditions were relatively poor at the beginning of the week, but did improve slightly later on, although the […]

Continue Reading

Propagation News – 23 September 2018

| September 21, 2018

First, the sunspot reported a few weeks ago as possibly being from the new sunspot cycle 25 was in fact from cycle 24. Although it had a reverse magnetic polarity signature than other cycle 24 spots, scientists now say that its low solar latitude means it was not from the new cycle. Scientists are also […]

Continue Reading

Propagation News – 16 September 2018

| September 14, 2018

Last week started with stable solar conditions, but very low activity. After 14 days without sunspots, two small, new spots turned up. Sunspot number 2721 existed for Sunday and Monday, then disappeared by Tuesday. Sunspot number 2722 popped up on Wednesday and Thursday, and was gone by Friday. Neither of these spots has disappeared altogether. […]

Continue Reading

Propagation News – 9 September 2018

| September 7, 2018

The Sun was spotless for most of last week and no spots are expected to rotate into view over the next few days. This will keep flux levels low, and working frequencies will remain depressed. Maximum useable frequencies may struggle to include the 18MHz band. Warnings of a rising Kp-index have been issued, and geomagnetic […]

Continue Reading