Io, the innermost of Jupiter’s Galilean moons, is the most volcanically active body in the Solar System. Its surface is constantly reshaped by eruptions that release more than 100 TW of thermal power, far exceeding Earth’s internal heat flow.
The primary energy source is tidal flexing caused by Jupiter’s strong gravity combined with Io’s slightly eccentric orbit. As Io moves closer and farther from Jupiter, the planet’s gravitational pull stretches and squeezes the moon, converting orbital energy into heat inside its interior.
The amount of heat generated can be estimated with a tidal‑dissipation formula that depends on the moon’s radius, orbital eccentricity, distance from the planet, and the material properties described by the Love number (k₂) and the tidal quality factor (Q).
What causes Io’s extreme volcanic activity?
How much thermal power does Io release?
What is the primary energy source for Io’s volcanic activity?
How does Jupiter’s gravitational pull affect Io?
Why is Io considered the most volcanically active body in the Solar System?
Results are for informational purposes only and do not constitute professional advice.