Gravitational and pressure couplings between the solid inner core (SIC) and the rest of the Earth give rise to torques through which the inner core influences the nutational motion of the Earth.

• 摘要地球固体内核(SIC)和地球其馀部分之间的引力和压力的耦合作用引起了一个力矩，从而对地球的章动运动产生影响。