This picture was taken at a color at which methane gas absorbs strongly. Thus most of the planet is dark, but regions with particles in the upper atmosphere above most of the absorbing methane gas appear bright. The equatorial regions and the Great Red Spot show very prominently, as do the north and south polar hoods.
North is to the upper left.
There are two disturbances due to the impact of pieces of comet Shoemaker-Levy 9. The one nearest the limb is from piece A, and the one nearer the center is from pieces E and F, which hit in nearly the same place on Jupiter.