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Northern Lights are caused by the collision of energetic charged particles with atoms in the high altitude atmosphere. The auroral zone is typically 10° to 20° from the magnetic pole defined by the axis of the Earth’s magnetic dipole. Aurora borealis is named after the Roman goddess of dawn, Aurora, and the Greek name for the north wind, Boreas, by Pierre Gassendi in 1621. Aalto University in Helsinki has also published a study of aurora-related sound and electric field effects. 2013 seems to be a great year to observe Northern Lights in Finland.
Unfortunately, northern lights are not that common in Vaasa and there also needs to be a clear sky in order to see them. Heading a bit more north to Oulu offers more opportunities to spot northern lights if you are in Finland.