I've never seen a white aurora before! Magic!
"An aurora is a natural light display in the sky (from the Latin wordaurora, "sunrise" or the Roman goddess of dawn), especially in the high latitude (Arctic and Antarctic) regions, caused by the collision ofsolar wind and magnetospheric charged particles with the high altitude atmosphere (thermosphere). The charged particles and solar wind are directed into the atmosphere by the Earth's magnetosphere."
If you now plan a trip to Lapland, visit the Aurora Sky Station in Finland.