THE ESTIMATION OF WESTWARD DRIFT IN MGF ON THE NORTH AMERICA AND THE EUROPE

In this paper, we have studied the westward drift in secular variation of MGF by the dynamo theory and the observatories’ data of intermagnet.org on the North America and the Europe (1991-2006). The longitudinal and latitudinal drifts exist on the North America. And longitudinal drift is also defined on the Europe in (1991-2006). These drifts are approximation with other investigation’s results.