Topography of the core-mantle boundary and lateral homogeneity of the liquid core

Details Topography of the core-mantle boundary and lateral homogeneity of the liquid core Topography of the core-mantle boundary and lateral homogeneity of the liquid core

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.325..678m&link_type=abstract

Nature (ISSN 0028-0836), vol. 325, Feb. 19, 1987, p. 678-683.

Physics

193

Earth Core, Earth Mantle, Earth Planetary Structure, Geodesy, Topography, Asphericity, Homogeneity, Ray Tracing, Reflected Waves, Seismology, Spherical Harmonics

Scientific paper

Separate inversions of travel-time residuals of waves reflected from and transmitted through the core-mantle boundary yield similar results in terms of spherical harmonic expansion of its topography up to degree and order four. This indicates the absence of detectable lateral heterogeneity in the liquid core. The relief of the boundary is + or - 6 km but its flattening, determined by the c2(0) term, does not depart significantly from the hydrostatic theory.

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