Auroras on Jupiter follow different mechanism than on Earth
Auroras on Earth are caused by charged particles coming from the Sun, which enter the atmosphere and create a glow. However, NASA's Juno spacecraft has found that Jupiter's auroras are formed by particles ejected mostly from Jupiter's moon 'Io'. Io's volcanoes spew huge amounts of sulphur and oxygen into space, loading Jupiter's magnetic field with particles, thereby creating the auroras.