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.
|1o -> 3+||Quiet magnetic field|
|4o -> 5-||Active magnetic field|
|5o -> 8+||Storm|
|Predicted Kp max||3|
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09:21 Aug 28 2014
|A Middle Latitude Auroral Activity Watch is currently in effect. There is a slight chance for middle latitude auroral activity.|
06:21 Aug 28 2014
|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.|
20:39 Aug 25 2014
|Strong M3.97 solar flare from sunspot region 12146|
|Last geomagnetic storm:||2014/08/29||Kp5 (G1)|