Io's volcanism makes the satellite one of only five known currently volcanically or cryovolcanically active worlds in the Solar System (the others being Earth, Venus, Saturn's moon Enceladus, and Neptune's moon Triton.)

Io (/ ˈ aɪ. oʊ /), or Jupiter I, is the innermost and second-smallest of the four Galilean moons of the planet Jupiter.

The thrust faulting and uplifting of large crust blocks on Io are interpreted by a model proposed by Schenk and Bulmer's 1998 paper. [3] In the model, Io's crust keeps recycling. Violent volcanic activity brings lava to the surface and older, buried layers are forced to subside. The old volcanic crust materials are compressed laterally as they ...

May 14, 2023 · The geology of Io has been assessed through study of these data, including global geological mapping (Crown et al. 1992; Williams et al. 2011a, b). Io has five primary types of geological features: plains, lava flows, paterae, mountains, and diffuse deposits.

Some models call for Io to have silica-rich crust about 40-60 km thick. The crust would be made of alkali-rich minerals, probably feldspars and nepheline. Much of the mantle may be pure forsterite (magnesian-rich olivine). The enormous gravitational forces of Jupiter cause heating within Io.

Mar 11, 2025 · Io, innermost of the four large moons (Galilean satellites) discovered around Jupiter by the Italian astronomer Galileo in 1610. It is the most volcanically active body in the solar system. As many as 300 volcanoes may be active on the satellite at a given time.

Oct 26, 2024 · Io is Jupiter's third largest moon, and the most volcanically active world in the solar system. Io was discovered on Jan. 8, 1610, by Galileo Galilei, along with Jupiter's three other largest moons: Europa, Ganymede. and Callisto.

Jun 10, 2020 · We demonstrate that magmatic intrusions are a key component of Io's crustal heat balance; around 80% of the magma delivered to the base of the crust must be emplaced and frozen as plutons to match rough estimates of crustal thickness.

Jan 27, 2005 · As Io rotates around Jupiter, the tidal bulge moves, Io's crust is flexed, and tremendous heat is generated - much like the heat generated in a piece of wire when it is quickly bent back and forth. This heat drives the volcanic activity so prevalent on Io.

Some models call for Io to have silica-rich crust about 40-60 km thick. The crust would be made of alkali-rich minerals, probably feldspars and nepheline. Much of the mantle may be pure forsterite (magnesian-rich olivine). The enormous gravitational forces of Jupiter cause heating within Io.