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 the Aurora or not. On the world map below, based on the current predicted Kp index, a line is drawn to indicate where the aurora can be seen at this very moment. The higher the Kp climbs, these closer the lines move towards the equator.