How often do the Northern Lights occur in Sweden?
Auroras occur more frequently near the poles, since the particles needed for the displays are attracted by the Earth’s magnetic field. Displays do in fact occur year-round, but it is in the deep darkness of the northern winter nights that they can be seen most easily and are at their most spectacular. Calm conditions are best, and the most intense part of a display will last between 10 and 30 minutes. In Sweden the most active auroras tend to occur before midnight, and during peak activity displays occur on average every other clear night, perhaps even more frequently.
