 The southern half of the Amirani flow field is surrounded by a white plume of bright sulfuric dioxide (SO2) diffuse deposits composed of basalt and silica, that freeze and fall to the ground during eruptions.The recent lava flows observed by the Galileo appeared to have covered about 620 square kilometers of Io in less than five months, which was almost 6 times greater than Hawaiian volcano Kīlauea covered in the span of 21 years.This volcano takes on characteristics of a shield volcano on Earth, in which its eruptions create pahoehoe-like lava flows and produce massive amounts of lava consisting of mainly basaltic material and sulfur.