South poles

So every time the center of the earht and that we would like to determine the magnétic pole of the earht ,then two variables at first the movement of nutation to the earht and at second the determination of the axis.so that Dynamic whenever we try to find the magnétic pole = = derives from the axis. x distance from the south pole of the earht to find the equator. / distance from the tectónicas plates to the interior.