Surface Density Values for the Earth from Satellite and Gravity Observations
TLDR
In this article, the Earth's gravity field is represented as the potential of a simple layer distributed over the surface of the Earth by combining satellite observations and gravity anomalies, and density values of the simple layer for 192 surface elements are computed and converted into harmonic coefficients up to the 15th degree and order.Abstract:
Summary
The representation of the Earth's gravity field as the potential of a simple layer distributed over the surface of the Earth is determined by combining satellite observations and gravity anomalies. Density values of the simple layer for 192 surface elements are computed and converted into harmonic coefficients up to the 15th degree and order. These co-efficients are used to determine surface density values referred to a reference ellipsoid with the flattening of an earth in hydrostatic equilibrium. The geophysical implications of these values are outlined.read more
Citations
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Journal ArticleDOI
Coseismic Deformation From Earthquake Faulting On A Layered Spherical Earth
TL;DR: In this paper, a method for calculating the static displacement field following earthquake faulting in a layered spherical earth is presented at shallow levels, the Earth's layering is characterized by sharp jumps in bulk and shear moduli at the Conrad discontinuity and the Moho and is therefore important to consider when evaluating crustal deformation.
Book ChapterDOI
Past and Future Developments in Geopotential Modeling
TL;DR: This paper reviewed the development and estimation of geopotential models over the past 96 years, starting from simple ellipsoidal normal gravity models to complex high degree (360/500) spherical harmonic expansions.
References
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Seismology and the new global tectonics
TL;DR: In this article, a comprehensive study of the observations of seismology provides widely based strong support for the new global tectonics which is founded on the hypotheses of continental drift, sea-floor spreading, transform faults and underthrusting of the lithosphere at island arcs.
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Sea-floor spreading and continental drift
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Some remarks on polar wandering
Peter Goldreich,Alar Toomre +1 more
TL;DR: For example, Earth polar wanderings attributed to rotation axis angular displacements generated by density redistribution on geologic time scale are attributed to density redistribution as discussed by the authors. But this is not always the case.
Journal ArticleDOI
Inhomogeneities in the Earth's Mantle
TL;DR: In this paper, the velocity structure of the Earth's mantle is determined with the emphasis on regions of anomalous variations (so-called "discontinuities"), indicating that the lower mantle is not homogeneous.
Journal ArticleDOI
On the Hydrostatic Theory of the Figure of the Earth
TL;DR: In this article, the external and dynamical ellipticities of the Earth for different values of the ratio I/Mb2, I being the mean moment of inertia and b the mean radius, on the first order Radau theory, were provided.