RSSGB2RS Propagation News

Propagation News – 7 July 2015

| June 5, 2015

We are now truly into the summer propagation season in the northern hemisphere, which is characterised by lower maximum usable frequencies during the day, compared with winter, but higher MUFs at night. Solar activity has continued to be low, with a solar flux index of around 100. There have been no major flares of note […]

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Propagation News – 31 May 2015

| May 29, 2015

As predicted, the sun was a little more settled this week, with the solar flux index being below 100. There were no X-class solar flares to black out HF either. Geomagnetic conditions were also settled with the Ap index at middle latitudes remaining in single figures. The Kp index, which is a better indicator of […]

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Propagation News – 24 May 2015

| May 22, 2015

This week has been a mixed bag in terms of solar activity. As predicted, the beginning of the week was unsettled with the Kp index hitting six on the 19th. The solar flux index started the week at 120, but by Thursday it had declined to around 106. Next week it is expected to remain […]

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Propagation News – 17 May 2015

| May 15, 2015

It looks like we got the HF forecast for last week about right. The Kp index stormed up to six on Wednesday 6th, remaining at four for the whole day. This was due to an enhanced solar wind stream above 700 km/s and a southward-facing Bz component of the interplanetary magnetic field. This negative Bz […]

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Propagation News – 10 May 2015

| May 8, 2015

This last week has not been a good one for HF. On Sunday 3rd there were solar flares and an earth-facing coronal mass ejection, with further flares on Tuesday. Later on Tuesday evening there was a massive X-class solar flare that blocked out HF in the Pacific region. This was followed on Wednesday by a […]

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Propagation News – 3 May 2015

| May 1, 2015

What a difference a week makes. Last week we said the solar flux index was predicted to hit the 130s. This week, apart from one tiny spot in the lower western quadrant, the sun is now looking very bare. At the time of writing the solar flux index was 104, and the USAF prediction for […]

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