An Aurora is seldom bright enough to see much colour, Video or motion pictures are not practical due to the length of the exposure required per frame.
but a regular 35 mm camera, on a tripod with an exposure of between 10-20 seconds will reveal a rainbow of colours.
The colour change can be caught over a number of pictures.
The single 20 second film exposure shown here, using computer software can suggest the undulation that goes on during the phenomenon.
