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: 1+
Predicted Kp: 1+ (+67m 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 density of the solar wind is moderate (21.2 p/cm3)
The strength of the interplanetary magnetic field is moderate (15.1nT), the direction is North (13.5nT).

Auroral activity

High latitude 39%
Middle latitude 0%
Low latitude 0%
Minor Severe
High latitude 30% 30%
Middle latitude 5% 1%
Predicted Kp max 3


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Latest alerts

Moderate M1.57 solar flare
Minor S1 class Space Radiation Storm - This happens around 50 times in a solar cycle
G1 - Minor geomagnetic storm (Kp 5) - 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.

Space weather facts

Last X-flare:2015/05/05X2.7
Last M-flare:2015/07/03M1.5
Last geomagnetic storm:2015/06/25Kp6 (G2)

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