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Sounding of Icy Galilean Satellites by Surface ObservatoriesSeveral independent geological and geophysical investigations suggest that Europa and Ganymede contain subsurface oceans. Using Jupiter's rotating magnetic field as a primary signal, the magnetometer experiment onboard Galileo has measured secondary induction signals emanating from Europa, Ganymede, and surprisingly Callisto. The strong electromagnetic induction from these moons suggests that large global electrical conductors are located just below their icy crusts. A detailed analysis reveals that global salty oceans with salinity similar to the Earth's ocean and thicknesses in the range of approx. 6-100 kms can explain the induction observed by the Galileo magnetometer. Additional information is contained in the original extended abstract.
Document ID
20010041250
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
Authors
Khurana, K. K.
(California Univ. Los Angeles, CA United States)
Banerdt, W. B.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Johnson, T. V.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Russell, C. T.
(California Univ. Los Angeles, CA United States)
Kivelson, M. G.
(California Univ. Los Angeles, CA United States)
Davis, P. M.
(California Univ. Los Angeles, CA United States)
Vidale, J. E.
(California Univ. Los Angeles, CA United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Publication Information
Publication: Forum on Innovative Approaches to Outer Planetary Exploration 2001-2020
Subject Category
Lunar And Planetary Science And Exploration
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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