What would have to occur to stop earth’s plate movement?

To stop the movement of the plates the inner core of the planet would have to loose lots of heat so it turns solid, then the plates would stop moving.However,if this happened we would loose the magnetic shield generated by the liquid metal near the core of the planet which protects us from radiation which is given of by the sun.

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Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere. the winds blow from west to east in jet streams but the flow often shifts to the north and south. jet streams follow the boundaries between hot and cold air. the earth's rotation is responsible for the jet stream as well.