Aurora Oval from Northern Hemisphere – Geomagnetic planetary K-indicies
Geomagnetic K-indicies, Tromso – der letzten 7 Tage
Oval from Northern Hemisphere Enlarged View
Aurora Oval from Northern Hemisphere – Geomagnetic planetary K-indicies
Geomagnetic activity index for Tromsø – die letzten 33 Tage
Activity Index since 1987, Tromso
Tromsø Geophysical Observatory 