Why does Venus lack a magnetic field

  title={Why does Venus lack a magnetic field},
  author={Francis Nimmo},
  • F. Nimmo
  • Published 1 November 2002
  • Geology, Physics
  • Geology
Venus and Earth have similar radii and estimated bulk compositions, and both have an iron core that is at least partially liquid. However, despite these similarities, Venus lacks an appreciable dipolar magnetic field. Here I examine the hypothesis that this absence is due to Venus9s also lacking plate tectonics for the past 0.5 b.y. The generation of a global magnetic field requires core convection, which in turn requires extraction of heat from the core into the overlying mantle. Plate… 

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  • W. M. Kaula
  • Geology
    Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences
  • 1994
Solid Venus has several differences from solid Earth: a mild variation in topography, with marked departures of some kilometres confined to less than 10% of the surface; no interconnected system of