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RSGB PROPOGATION:

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Propagation News – 16 February 2025Fri 14th Feb 2025 14:48 GMT

Two large coronal holes on the Sun’s surface have been spraying solar material towards Earth, pushing the Kp index to a high of 4.67. The solar wind speed has been consistently higher than 500 kilometres per second and, with a south-pointing interplanetary magnetic field, the plasma has flooded into Earth’s magnetic field. There have been […]

Propagation News – 9 February 2025Thu 6th Feb 2025 16:10 GMT

Last week went pretty much as predicted. The solar wind from a large coronal hole impacted the Earth on Saturday 1 February, pushing the Kp index to four. The hole was so large that the geomagnetic disturbance lasted until the early evening on Sunday. Once the solar wind speed had dropped, things got back to […]

Propagation News – 2 February 2025Fri 31st Jan 2025 14:25 GMT

Last week was pretty unremarkable as far as the Sun goes, but it looks like that is about to change. The seven days preceding Thursday 30 January were characterised by reasonably settled geomagnetic conditions, with a maximum Kp index of 3.67 and a solar flux index that fell from 205 on the 24 January, to […]

Propagation News – 26 January 2025Mon 27th Jan 2025 12:38 GMT

This week, ending Sunday 26 January, has looked a lot like a repeat performance of two weeks ago. The majority of the sunspots are in the western hemisphere with very few in the eastern side. This means that the solar flux index could drop over the coming week unless there are sunspots ready to rotate […]

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