Preliminary reference earth model

  title={Preliminary reference earth model},
  author={Adam M. Dziewoński and Don L. Anderson},
  journal={Physics of the Earth and Planetary Interiors},
Global 1-D Earth models
For many years the most widely used 1-D model of seismic velocities in the Earth has been the Preliminary Reference Earth Model (PREM) of Dziewonski and Anderson (1981). This model was designed to
In the past few years, seismic tomography has begun to provide detailed images of seismic velocity in the Earth's interior which, for the first time, give direct observational constraints on the
Three-Dimensional Velocity Structure of the Earth’s Upper Mantle
Global seismic tomography now has a history of more than 20 years, and it is possible to identify several trends in research and the continuing evolution towards more accurate and refined models of
The global attenuation structure of the upper mantle
[1] A large data set of fundamental mode Rayleigh wave amplitudes is analyzed to derive a new global three-dimensional model of shear wave attenuation in the upper mantle. The amplitude observations
Degree 12 model of shear velocity heterogeneity in the mantle
We obtain a three-dimensional (3D) model of shear wave velocity heterogeneity of the Earth's mantle by inverting a large set of seismic data consisting of 27,000 long-period seismograms and 14,000
A degree 8 mantle shear velocity model from normal mode observations below 3 mHz
We present inversions for a new three-dimensional mantle v s model, MM2―L12D8, using a recently compiled catalogue of ∼ 2300 normal mode structure coefficients for 90 multiplets below 3 mHz. These
3-D upper mantle shear velocity and attenuation from fundamental mode free oscillation data
SUMMARY We present the results of global measurements of spheroidal and toroidal fundamental mode eigenfrequencies as well as fundamental spheroidal mode attenuation made from a data set consisting
Normal-mode constraints on the structure of the Earth
We have analyzed the splitting characteristics of 75 spheroidal free oscillations excited by the Great 1994 Bolivia and Kuril Islands earthquakes. These spheroidal modes may be roughly subdivided in
The upper mantle degree 2: Constraints and inferences from global mantle wave attenuation measurements
We present the results of an analysis of global lateral variations in anelasticity of the upper mantle, as measured from very long period Rayleigh waves observed on the GEOSCOPE network. Four


Earth structure from free oscillations and travel times: Geophys
An extensive set of reliable gross Earth data has been inverted to obtain a new estimate of the radial variations of seismic velocities and density in the Earth. The basic data set includes the
Regionalized shear velocity models of the Pacific upper mantle from observed Love and Rayleigh wave dispersion
Summary. Group and phase velocities for periods between 16 and 110 s have been determined using the single-station method along 33 Rayleigh-and 30 Love-wave paths across the Pacific. These dispersion
Observations of Normal Modes from 84 Recordings of the Alaskan Earthquake of 1964 March 28
Summary We have taken 84 World Wide Standard Seismograph Network recordings of the Alaskan earthquake of 1964 March 28, one of the largest earthquakes in history, and have made an intensive search
On Regional Differences in Dispersion of Mantle Rayleigh Waves
Summary Rayleigh waves generated by the Peru-Bolivian border earthquake of 1963 August 15 have been analysed at 35 WWSSN stations in the period range between 150 and 300 seconds. Thirty-one of
P-wave travel times from deep earthquakes
A study of teleseismic P -wave travel times has been made using data from deep (450 to 650 km) earthquakes exclusively, for which the effect of near-source upper mantle heterogeneity is expected to
The Early Structural Evolution and Anisotropy of the Oceanic Upper Mantle
Summary The dispersion of Love and Rayleigh waves in the period range 17–167 s is used to detect the change in the structure of the upper mantle as the age of the sea-floor increases away from the
Anisotropy of the Pacific upper mantle
Abstract : Seismic refraction measurements of the compressional wave velocity of the upper mantle, obtained in the northeast Pacific Ocean between California and Hawaii, have shown a dependence on
An application of normal mode theory to the retrieval of structural parameters and source mechanisms from seismic spectra
  • F. Gilbert, A. Dziewoński
  • Geology
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1975
A cyclic process of refining models of the mechanical structure of the Earth and models of the mechanism of one or more earthquakes is developed. The theory of the elastic-gravitational free