Lecture4_Geophy101_Mag - Magnetic Geophy 101 1 M.Ghaleb...

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Lecture 4, 26 / 11 / 2008 M. Ghaleb 1 Magnetic Geophy 101
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Lecture 4, 26 / 11 / 2008 M. Ghaleb 2 Lecture 4 2008 / 2009
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Lecture 4, 26 / 11 / 2008 M. Ghaleb 3 Lecture 3 The Geomagnetic Field 1. Elements of the Geomagnetic Field 2. Magnetic Poles 3. Non-dipole field
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Lecture 4, 26 / 11 / 2008 M. Ghaleb 4 Magnetic Poles
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Lecture 4, 26 / 11 / 2008 M. Ghaleb 5 Geographic Pole The points of intersection between the axis of rotation of earth with its surface.
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Lecture 4, 26 / 11 / 2008 M. Ghaleb 6 Magnetic Poles Earth’s magnetic poles 1. Geomagnetic poles The points in which the central best-fitting-dipole intersects the earth’s surface. 1. Dip poles The points on the earth’s surface where the magnetic field is directed vertically downwards (I=90 ° ) (after Sharma, 1978)
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Lecture 4, 26 / 11 / 2008 M. Ghaleb 7 Q What is the central best-fitting-dipole? A Is the theoretical bar magnet whose magnetic field is equivalent to the magnetic field of the earth.
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Lecture 4, 26 / 11 / 2008 M. Ghaleb
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Lecture4_Geophy101_Mag - Magnetic Geophy 101 1 M.Ghaleb...

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