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: 2-
Predicted Kp: 1+ (+70m Kp: 2o)
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 direction of the interplanetary magnetic field is slightly South (-5.2nT).
The maximum X-ray flux of the past two hours is:

Auroral activity

High latitude 50%
Middle latitude 2%
Low latitude 2%
Minor Severe
High latitude 25% 60%
Middle latitude 25% 5%
Predicted Kp max 5


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Latest alerts

G1 - Minor geomagnetic storm (Kp 5o) - High latitude sky watchers have a chance to see visual aurora. The higher middle latitudes might see aurora on the northern or southern horizon, depending on which hemisphere you are located.
Moderate M2.44 solar flare
Moderate M1.27 solar flare

Space weather facts

Last X-flare:2014/12/20X1.8
Last M-flare:2015/02/09M2.4
Last geomagnetic storm:2015/02/24Kp5 (G1)

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