Aktivitäts Übersicht Provisional K-indices – last seven days Tromso – Realtime magnetogram, 24 hr plot ACE Real-Time Solar Wind Auroral forecast for Tromsø – 1 hour ahead Geomagnetic K-indicies, Tromso – der letzten 7 Tage Geomagnetic activity index for Tromsø – die letzten 33 Tage Oval from Northern Hemisphere Enlarged View Activity Index since 1987, Tromso Tromsø Geophysical Observatory