The author has already studied the forces and motions of plates in different subzones of the Earth (Figure 2-12). After analyzing the force movement of the spherical plate across the Earth's equator under the action of weak strong mid-latitude force, the system of global strong mid-latitude force acting on the plate and its movement can be established. Figure 2-14 shows, with a slight exaggeration of the height of the position, an analysis of Plate A as it begins to be stressed in the Southern Hemisphere and moves along the trajectory of the force under the action of a fixed force. At this time the earth is revolving, and passing through point 1, plate A reaches the equator, and then proceeds under the action of the fixed force; passing through point 2, plate A has entered the northern hemisphere, although it is still under the ecliptic plane; and when it turns to point 3, it has penetrated through the tangent ecliptic plane and reached the ecliptic plane, although the latitude at which plate A is transported to the northern hemisphere under the action of a strong mid-latitude force from the southern hemisphere is unchanged; and when it reaches point 4, it has entered the The northern hemisphere's fixed strong mid-latitude force line of action; under the action of the fixed force, plate A along the fixed trajectory to reach point 5, it is completely out of the southern hemisphere into the northern hemisphere and the northern hemisphere under the control of the system of action force.
This exchange is reversible (reverse motion analysis omitted).
For an analysis of the motion of the plate from the belt through the tangential ecliptic plane into the zone of maximum strong mid-latitude force action, see the analysis of the motion of the atmosphere in this zone.