Gravitational coupling in a triaxial ellipsoidal Earth

  title={Gravitational coupling in a triaxial ellipsoidal Earth},
  author={A. M. K. Szeto and Su Xu},
Gravitational coupling within an axially symmetric, ellipsoidal Earth gives rise to torques among the mantle, outer core, and inner core. Such torques act along “lines of nodes”, i.e., orthogonal to axes of symmetry. In a triaxial Earth model, small deviations from axial symmetry modify the torques in direction as well as magnitude. The perturbative torques depend on three Euler angles specifying the long axis of the inner core relative to that of the mantle shell. Their magnitudes, excluding… CONTINUE READING