Anisotropy in the Inner Core: Could It Be Due To Low-Order Convection?

Science  08 Nov 1996:
Vol. 274, Issue 5289, pp. 963-966
DOI: 10.1126/science.274.5289.963


A recently assembled data set of inner core-sensitive free oscillation splitting measurements and body wave differential travel times provides constraints on the patterns of anisotropy in the Earth's inner core. Applying a formalism that allows departures from radial symmetry and cylindrical anisotropy results in models with P wave velocity distributions whose strength and pattern are incompatible with frozen-in anisotropy, but rather suggest a simple large-scale convection regime in the inner core.