Geophysical Journal | 2001 volume 23 3

On the movement of foci of secular geomagnetic variations and the depth of their sources

© Yaremenko L.N.

Maps of secular variations have been compiled on the basis of some magnetic field components 50 years for the epochs from 1550 to 2000. On a composite map the movement of for Z, X, Y is shown for the whole time. It is shown that when approximating the field by dipoles the latter should be placed in the Earth's core.

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