Io's atmosphere (the reddish haze in the artist's sketch, above), which is largely made of sulfur dioxide, originates from volcanic plumes scattered around the moon (depicted as blue fountains, above). (sciencemag.org)
Volcanic plume rises from the Kilauea volcano following a 6.9 - magnitude earthquake 4 May 2018 in Leilani Estates, Hawaii. (carbonbrief.org)
It has recorded towering volcanic plumes above Jupiter's moon Io, gathered evidence that Europa might have an ocean beneath its icy carapace, and investigated the intense radiation environment near Jupiter. (sciencenews.org)