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… 
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: IO DISSIPATION
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
Active volcanism observed on Io is thought to be driven by the temporally periodic, spatially differential projection of Jupiter's gravitational field over the moon. Previous theoretical estimates of
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
Magnetic Anomalies on Io and Their Relationship to the Spatial Distribution of Volcanic Centers
Abstract Forward modeling of planetary-scale magnetic anomalies due to induced crustal magnetization of Io is developed. The approach involves finite difference modeling of a temporally- and
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 Mearth. Due to high gravity and pressures in the mantles of these planets,
In Search of Subsurface Oceans within the Uranian Moons
The Galileo mission to Jupiter discovered magnetic signatures associated with hidden sub-surface 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
Powering the Galilean Satellites with Moon‐Moon Tides
There is compelling evidence for subsurface water oceans among the three outer Galilean satellites, and evidence for an internal magma ocean in the innermost moon, Io. Tidal forces from Jupiter
Magma ascent pathways associated with large mountains on Io
Abstract While Jupiter's moon Io is the most volcanically active body in the Solar System, the largest mountains seen on Io are created by tectonic forces rather than volcanic construction. Pervasive


▪ 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.
Partial melting below the magmatic arc in the central Andes deduced from geoelectromagnetic field experiments and laboratory data
Abstract Magnetotelluric and geomagnetic deep soudings in northern Chile revealed a pronounced high conductivity zone (HCZ). Below the Western Cordillera, which constitutes the present magmatic arc
Evidence for accumulated melt beneath the slow–spreading Mid–Atlantic Ridge
  • M. Sinha, D. Navin, +5 authors 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
New estimates for Io eruption temperatures: Implications for the interior
Abstract The initial interpretation of Galileo data from Jupiter's moon, Io, suggested eruption temperatures ⩾ 1600 ° C . Tidal heating models have difficulties explaining Io's prodigious heat flow
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
Abstract An extensive set of HI Lyman-α images obtained with the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) from 1997–2001 has been analyzed to provide information about
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
Tidal dissipation, surface heat flow, and figure of viscoelastic models of Io
Abstract The distribution of hot spots on Io's surface and Io's figure constrain models of Io's interior. Voyager observations indicate that most hot spots and volcanic plumes are close to the