Amirani

Amirani is an active volcano on Jupiter's moon Io, the inner-most of the Galilean Moons. It is located on Io's leading hemisphere at . The volcano is responsible for the largest active lava flow in the entire Solar System, with recent flows dwarfing those of even other volcanos on Io. The volcano was first observed in images acquired by the Voyager 1 spacecraft in March 1979. Later that year, the International Astronomical Union named this feature after a Georgian fire god, Amirani. Composition and physical attributes Amirani is about the same age as Jupiter, which is around 4.5 billion years old. It is surrounded by the Gish Bar Patera. Within the mountains of the crater, Amirani lies at the center of a frozen sulphuric lava field that consists of a half-circle shaped, 37 kilometer wide volcanic pit, which is connected to a 330 kilometer compound lava flow by a narrow channel. 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.