Should I Go Tonight · Unlikely
Unlikely in Tromsø tonight
30/100
- Moderate auroral activity (11%)
- Kp 0.0 is below the Tromsø threshold (Kp 2)
- Sky is currently dark
Best Spots Tonight
1
TromsøNorway
Kp 2+11% overheadDark sky
30
2
AltaNorway
Kp 2+12% overheadDark sky
30
3
AbiskoSweden
Kp 2+9% overheadDark sky
29
Ranked by live conditions · tap a city for the full forecast
Live Aurora Map
5,191 active cellsReal-time auroral oval from NOAA's OVATION model. Scroll to zoom, drag to pan, click a city for details.
Planetary Kp
Quiet
Global geomagnetic activity index (0–9).
Solar Wind
Wind Speed
379km/s
Faster solar wind delivers more energy to the magnetosphere.
Density
8.3p/cm³
Proton density of the incoming solar wind stream.
Bz
+3.4nT
Southward (negative) Bz is the key driver of strong aurora.
Bt
7.2nT
Total strength of the interplanetary magnetic field.
Bz is pointing north — less favourable for aurora right now.
Geomagnetic Storm Scale
Storm: G3 Strong
G1
Minor
Kp 5
G2
Moderate
Kp 6
G3
Strong
Kp 7
G4
Severe
Kp 8
G5
Extreme
Kp 9
27-Day Outlook
Best: Oct 31 (Kp 5)Hover or tap a bar for that day's forecast
Oct 26Nov 8Nov 21
QuietUnsettledActiveStorm
1.0×
Source: NOAA SWPC · OVATION Model · Refreshes every 60s