The Kp-index as a global aurora indicator

The Kp-index is a global geomagnetic storm index with a scale of 0 to 9. Based on the Kp-index, you can immediately know if there is a chance to see aurora or not. On the world map below, the average equatorward boundary of the midnight aurora is shown based on the current predicted Kp-index. This gives us a good indication where we could see the aurora right now in areas where the current local time is close to midnight. The higher the Kp climbs, the closer the lines move towards the equator.

Keep in mind that this is not a precise boundary and the auroral oval could be slightly more northward or southward than indicated on this map. Use this map as a quick guide. If you are close to the position of the line on this map then you have a chance to see the aurora about 20º above the horizon.

KP index

Observed Kp: 2o
Predicted Kp: 3- (+63m Kp: 1+)
1o -> 3+ Quiet magnetic field
4o -> 5- Active magnetic field
5o -> 8+ Storm
9o Extreme storm
KP index
Current data suggest that it is not possible to see aurora now at middle latitudes
The maximum X-ray flux of the past two hours is:
C1.9

Auroral activity

Live
chance
High latitude 76%
Middle latitude 3%
Low latitude 3%
Today
Minor Severe
High latitude 25% 35%
Middle latitude 10% 1%
Predicted Kp max 3

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