Blue lines show Earth's northern magnetic field and the magnetic north pole in an artist's rendering. Picture courtesy Stefan Maus, NOAA NGDC From National Geographic:
Earth's north magnetic pole is racing toward Russia at almost 40 miles (64 kilometers) a year due to magnetic changes in the planet's core, new research says.
The core is too deep for scientists to directly detect its magnetic field. But researchers can infer the field's movements by tracking how Earth's magnetic field has been changing at the surface and in space.
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