Evidence of a Global Magma Ocean in Io’s Interior

  title={Evidence of a Global Magma Ocean in Io’s Interior},
  author={Krishan K. Khurana and Xianzhe Jia and Margaret G. Kivelson and Francis Nimmo and Gerald Schubert and Christopher T. Russell},
  pages={1186 - 1189}
Magnetic field measurements made near Jupiter’s moon Io strengthen the evidence for a magma ocean in its interior. Extensive volcanism and high-temperature lavas hint at a global magma reservoir in Io, but no direct evidence has been available. We exploited Jupiter’s rotating magnetic field as a sounding signal and show that the magnetometer data collected by the Galileo spacecraft near Io provide evidence of electromagnetic induction from a global conducting layer. We demonstrate that a… 

A Subsurface Magma Ocean on Io: Exploring the Steady State of Partially Molten Planetary Bodies

Intense tidal heating within Io produces active volcanism on the surface, and its internal structure has long been a subject of debate. A recent reanalysis of the Galileo magnetometer data suggested

Io's Tortured Interior

Magnetic measurements made by the Galileo spacecraft reveal an ocean of magma under Io's frozen surface. Jupiter's moon Io is the most volcanic object in the solar system, injecting about a metric

A test for Io's magma ocean: Modeling tidal dissipation with a partially molten mantle

Magnetic induction measurements and astrometry provide constraints on the internal structure of Io, a volcanically active moon of Jupiter. We model the tidal response of a partially molten Io using

The Librations, Tides, and Interior Structure of Io

The melt zone in the volcanically active satellite Io plays a key role in diverse processes such as volcanism, heat transfer, tidal dissipation, and the orbital evolution of the Galilean satellites

Magmatic Intrusions Control Io's Crustal Thickness

Io, the most volcanically active body in the solar system, loses heat through eruptions of hot lava. Heat is supplied by tidal dissipation and is thought to be transferred through the mantle by

Electromagnetic induction heating as a driver of volcanic activity on massive rocky planets

Aims. We investigate possible driving mechanisms of volcanic activity on rocky super-Earths with masses exceeding 3–4 M⊕. Due to high gravity and pressures in the mantles of these planets, melting in

In Search of Subsurface Oceans Within the Uranian Moons

The Galileo mission to Jupiter discovered magnetic signatures associated with hidden subsurface oceans at the moons Europa and Callisto using the phenomenon of magnetic induction. These induced

Mountain building on Io driven by deep faulting

The high relief on Jupiter’s moon Io has been linked to compression due to global subsidence. Simulations show that Io’s mountains may form along thrust faults that initiate at the lithosphere’s base




▪ Abstract Io, innermost of Jupiter's large moons, is one of the most unusual objects in the Solar System. Tidal heating of the interior produces a global heat flux 40 times the terrestrial value,

Subsurface Oceans on Europa and Callisto: Constraints from Galileo Magnetometer Observations

Magnetic field perturbations measured during Galileo flybys of Europa and Callisto are consistent with dipole fields induced by the temporal variations of the ambient jovian magnetospheric field.

Induced magnetic fields as evidence for subsurface oceans in Europa and Callisto

P perturbations of the external magnetic fields (associated with Jupiter's inner magnetosphere) in the vicinity of both Europa and Callisto are reported, and it is argued that these conducting layers may best be explained by the presence of salty liquid-water oceans.

Evidence for accumulated melt beneath the slow–spreading Mid–Atlantic Ridge

  • M. SinhaD. Navin M. Inglis
  • Geology
    Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
  • 1997
The analysis of data from a multi–component geophysical experiment conducted on a segment of the slow–spreading (20 mm yr-1) Mid–Atlantic Ridge shows compelling evidence for a significant crustal

Implications from Galileo Observations on the Interior Structure and Chemistry of the Galilean Satellites

Abstract Data from the recent gravity measurements by the Galileo mission are used to construct wide ranges of interior structure and composition models for the Galilean satellites of Jupiter. These

Io's dayside SO2 atmosphere

Interpretation of Galileo's Io plasma and field observations: I0, I24, and I27 flybys and close polar passes

[1] We interpret plasma and magnetic field observations taken during the Galileo spacecraft Io flybys I0 in December 1995, I24 in October 1999, and I27 in February 2000, and we give predictions for a

Magmatic Differentiation of Io

Abstract If Io has been volcanically active through much of its history, it must be highly differentiated. We present an initial attempt to quantify the differentiation of the silicate portion of Io.