Earth's magnetic field is generated by the geodynamo mechanism operating in the liquid, electrically conductive outer core, where convective and rotational (Coriolis-influenced) motions of molten iron-nickel alloy generate and sustain electric currents that produce the planet's magnetic field, whereas the solid inner core, mantle, and crust do not directly generate this field.
The geodynamo theory explains Earth's magnetic field as arising from vigorous convective motion of electrically conductive liquid iron-rich alloy in the outer core, driven by...
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