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originally posted by: MissSmartypants
I live in Norfolk Virginia near an airport and there is also a large military presence in the area...so I am quite familiar with the sound of military aircraft flying overhead, as well as the accompanying rumbling sensation.
It's just common sense that if the magnetic pole moves by hundreds of miles, metal minerals/rocks deep in the Earth would react.
Earth’s magnetic field is created in the swirling outer core. Magnetism in the outer core is about 50 times stronger than it is on the surface.
It might be easy to think that Earth’s magnetism is caused by the big ball of solid iron in the middle. But in the inner core, the temperature is so high the magnetism of iron is altered. Once this temperature, called the Curie point, is reached, the atoms of a substance can no longer align to a magnetic point.