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: 3-
Predicted Kp: 2o (+62m Kp: 2+)
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:

Auroral activity

High latitude 76%
Middle latitude 3%
Low latitude 3%
Minor Severe
High latitude 15% 10%
Middle latitude 1% 1%
Predicted Kp max 3


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Latest alerts

A Middle Latitude Auroral Activity Watch is currently in effect. There is a slight chance for middle latitude auroral activity.
G2 - Moderate geomagnetic storm (Kp 6o) - High latitude sky watchers have a high chance to see visual aurora. The higher middle latitudes have a good chance to see visible aurora on the northern or southern horizon, depending on which hemisphere you are located. There is also a slight chance for weak aurora on the horizon at the lower middle latitudes but the chances are still low.
Strong M3.97 solar flare from sunspot region 12146

Space weather facts

Last X-flare:2014/06/11X1.0
Last M-flare:2014/08/25M3.9
Last geomagnetic storm:2014/08/29Kp5 (G1)

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