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Earth’s stormy heart
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Earth’s stormy heart

09/10/2013 2733 views 27 likes 274918 ID
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Earth’s magnetic field is thought to be generated largely by an ocean of superheated, swirling liquid iron that makes up Earth’s outer core 3000 km under our feet. Acting like the spinning conductor in a bicycle dynamo, it generates electric currents and thus the continuously changing electromagnetic field.

  • ESA/AOES Medialab
  • Observing the Earth
  • Swarm
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