Spaceweather.

THE SOLAR WIND IS HERE: Earth is inside a stream of solar wind flowing almost 600 km/s. First contact on Jan. 25th produced an unexpected G1-class geomagnetic storm, Storm conditions are subsiding now However, Arctic auroras are still possible (even likely) on Jan. 26th as the solar wind continues to blow.

https://spaceweather.com/glossary/g1.jpg

This site might help a bit Bob: https://www.spaceweather.com/ without buying a book! smile

Last edited by Graham, G4FUJ; 26/01/21 10:03 AM.

Graham (G4FUJ)

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