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Unformatted text preview: Hurricane The Earth's Magnetic Field The Earth has a substantial magnetic field, a fact of some historical importance because of the role of the magnetic compass in exploration of the planet. Structure of the Field The field lines defining the structure of the magnetic field are similar to those of a simple bar magnet, as illustrated in the following figure. The Earth's magnetic field and Van Allen radiation belts It is well known that the axis of the magnetic field is tipped with respect to the rotation axis of the Earth. Thus, true north (defined by the direction to the north rotational pole) does not coincide with magnetic north (defined by the direction to the north magnetic pole) and compass directions must be corrected by fixed amounts at given points on the surface of the Earth to yield true directions....
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- Fall '10
- Anthropology, Magnetic Field, Tropical cyclone, Earth's magnetic field, Cyclone