RSSGB2RS Propagation News

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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Propagation News – 26 April 2015

| April 24, 2015

Last week we said that the NOAA prediction was for a solar flux index of up to 135, but we thought this was pessimistic. We were proved right as the SFI soared to 154 on the 21st. However conditions remained very unsettled with the Kp index hitting four at times and with many M-class solar […]

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Propagation News – 19 April 2015

| April 17, 2015

The last week saw some very unsettled conditions in terms of geomagnetic disturbances, just as we predicted. The 14th, 15th and 16th were particularly bad, with the planetary K index hitting five and the solar wind speed exceeding 600 kilometres per second, sparking reports of visible aurora. The solar flux index leapt up to 155 […]

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Propagation News – 12 April 2015

| April 10, 2015

Last week we said that the sun was virtually clear, but spots have a habit of popping up from nowhere. This is exactly what did happen, pushing the solar flux index to a high of 126. Geomagnetic conditions were relatively settled, helping to improve HF propagation. This high declined as the week went on and […]

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