Geomagnetism refers to the study of the Earth's magnetic field, its origin, changes, and effects. The Earth's magnetic field is generated by the movement of molten iron and other metals in its outer core, which creates electric currents that, in turn, produce magnetic fields. Key aspects of geomagnetism include: 1. **Magnetic Field Characteristics**: The Earth's magnetic field resembles that of a giant bar magnet tilted about 11 degrees from the rotational axis of the Earth.
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