This composite video illustrates the auroras on Jupiter relative to their position on the giant planet. As on Earth, auroras are produced by the interaction of a planet's magnetic field with its atmosphere. The Jupiter auroras observed by Hubble Space Telescope are some of the most active and brightest ever caught by Hubble, reaching intensities over a thousand times brighter than those seen on Earth. Hubble's sensitivity to ultraviolet light captures the glow of the auroras above Jupiter's cloud top.
Video Credit: NASA, ESA, J. Nichols, G. Bacon (STScI), A. Simon (GSFC) and the OPAL team
Explanation from: http://hubblesite.org/newscenter/archive/releases/2016/24/video/c/