From SpaceWeather.com:
We’ve collected every aurora photo ever published on SpaceWeather.com into one “mega-gallery.” There are spooky auroras, man-made auroras, auroras in Florida, auroras at the South Pole, auroras beneath the space shuttle–thousands of photos. Together, they are a unique chronicle of space weather since the year 2000. Browse the collection at http://www.spaceweather.com/aurora/gallery.html.