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  • Diagram of the Earth’s magnetic field.
    Rights: The University of Waikato Te Whare Wānanga o Waikato Published 11 May 2011, Updated 21 November 2017 Size: 470 KB Referencing Hub media

    The Earth has a magnetic field extending thousands of kilometres into space. There is no big magnet inside the Earth. How the field is made, and why it occasionally reverses direction, is not fully understood.

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