volcanic dust English Susan B. Patera active volcanoes English English volcanic dust http://en.wikipedia.org/wiki/Volcanology_of_Io sulfur English http://en.wikipedia.org/wiki/Volcanology_of_Io English Jupiter’s moon Io actividad geológica de Ío active volcanoes English NASA en.wikipedia.org English https://en.wikipedia.org/wiki/Volcanology_of_Io#Discovery volcanoes