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International Journal of Geophysics
Volume 2013, Article ID 202763, 12 pages
Research Article

The Study of Westward Drift in the Main Geomagnetic Field

Research Center for Astronomy and Geophysics, Mongolian Academy of Sciences (MAS), Ulaanbaatar, Mongolia

Received 8 January 2013; Revised 12 March 2013; Accepted 20 March 2013

Academic Editor: Rudolf A. Treumann

Copyright © 2013 G. Bayanjargal. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We have obtained a solution for the velocity of westward drift from the induction equation in which an approach for main geomagnetic field was built. Distribution functions B(r, t) entered into the induction equation have been built by the observatories' data in North America and the Europe from 1991 to 2006. The longitudinal −0.123 degree/year and latitudinal 0.068 degree/year drifts were defined in North America. And the longitudinal −0.257 degree/year drift was defined in Europe from 1991 to 2006. These drifts are similar to results of other studies.