English: Plot of the earth's magnetic field components, in the approximation of an ideal dipole field. The three plot lines show the total field strength (blue), radial (vertical) field component (magenta) and the horizontal (south to north) field component (yellow). Field strengths are given in microteslas and the geographic latitude is given in degrees. The field strength reaches up to around 60 microteslas at the poles. At the equator, the field is purely horizontal. At the poles the field is purely vertical with twice the modulus than at the equator. The absolute value of the two orthogonal components is:
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