Its translational motions are commonly called Slichter modes, and early mod
Its translational motions are commonly called Slichter modes, and early models for it included a 450 km thick F-layer on its exterior. An important discovery about its differential rotation was made by Dziewonski, and it was hypothesized by Inge Lehmann in 1936. The cause of faster propagation of seismic waves parallel to earth's rotation axis in this region is uncertain, and its interactions with the region above it generate the earth's magnetic field according to the geodynamo theory. For 10 points, identify this region composed mainly of a iron-nickel alloy, which may be found below the outer core.
Its translational motions are commonly called Slichter modes, and early models for it included a 450 km thick F-layer on its exterior.
inner core [prompt on core until "F-layer"]