They come unexpected dancing and swaying in the night sky

Aurora follows a Sunspot cycle of 11-years. The electrical and magnetic forces react with one another to form an enigmatic assortment of colors. The "dancing" is due to the constant rearrangement of the way they react. Sometimes, away from the city, when the Solar storm activity is vigorous, sounds like crackle, claps can also be heard. But one cannot find them at a specific time or day. Although from regions like Alaska and Greenland, they can be observed quite frequently at any time of the year, the chances of observing the most spectacular display in 2015 are very high.