User:Mantledynamics/Draft of PREM Article

Preliminary Reference Earth Model (PREM)
The Preliminary Reference Earth Model is a 1-D model representing the average Earth properties as a function of planetary radius. PREM was developed in response to guidelines of a "Standard Earth Model Committee" of the International Association of Geodesy (IAG) and the International Association of Seismology and Physics of the Earth's Interior (IASPEI).

PREM has been widely used as the basis for seismic tomography and related global geophysical models. PREM incorporates anelastic dispersion and anisotropy and therefore it is frequency-dependent and transversely isotropic for the upper mantle.

PREM comprises a table of Earth properties, including elastic properties, Q, density, pressure, and gravity, as a function of planetary radius.

PREM was developed by Adam M. Dziewonski and Don L. Anderson.

Other Earth Reference Models include IASPE91.