Revisiting some pictures of spectacular Alaska aurorae. At this experiment facility, our goal is to create 'artificial aurora', so natural aurora is always so fascinating to us that we keep our experiment running on the side when it appears and dash out in -30 degrees F. My first post was on aurora, which also said something about the mechanism that causes aurora.
All the tripods were taken while trying to take this one. So the picture is a little blurred. I like it however, because it looks like a brush art instead of a photograph.