Io's Volcanic Activity

Io, Jupiter's innermost large moon, is the most volcanically active body in the solar system, with hundreds of erupting volcanoes. This intense activity is driven by tremendous tidal forces from Jupiter's gravity and orbital resonances with neighboring moons Europa and Ganymede. These forces flex Io's interior, generating immense friction and heat that melt rock into magma. The constant eruptions resurface the moon, creating a landscape of colorful sulfur plains and silicate mountains, unlike any other.