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Preliminary reference earth model
A large data set consisting of about 1000 normal mode periods, 500 summary travel time observations, 100 normal mode Q values, mass and moment of inertia have been inverted to obtain the radial
Determination of earthquake source parameters from waveform data for studies of global and regional seismicity
It is possible to use the waveform data not only to derive the source mechanism of an earthquake but also to establish the hypocentral coordinates of the ‘best point source’ (the centroid of the
The global CMT project 2004–2010: Centroid-moment tensors for 13,017 earthquakes
Earthquake moment tensors reflecting seven years of global seismic activity (2004–2010) are presented. The results are the product of the global centroid-moment-tensor (GCMT) project, which maintains
The Relative Behavior of Shear Velocity, Bulk Sound Speed, and Compressional Velocity in the Mantle: Implications for Chemical and Thermal Structure
Despite immense progress in imaging seismic velocity anomalies in the mantle over the past 15 years, we still know relatively little about their physical cause. One way to shed some light on this
Anisotropic shear‐wave velocity structure of the Earth's mantle: A global model
[1] We combine a new, large data set of surface wave phase anomalies, long-period waveforms, and body wave travel times to construct a three-dimensional model of the anisotropic shear wave velocity
A technique for the analysis of transient seismic signals
An analytical method, called the “multiple filter technique,” is shown to be a fast and efficient means of studying multi-mode dispersed signals. Amplitudes and phases, as functions of period and
The unique anisotropy of the Pacific upper mantle
The development and interpretation of tomographic models of the Earth's mantle have usually proceeded under the assumption that fast and slow seismic velocity anomalies represent a spatially
Mapping the lower mantle: Determination of lateral heterogeneity in P velocity up to degree and order 6
The data from the International Seismological Centre bulletins for the years 1964–1979 are used to derive a three-dimensional model of lateral variations of the P velocity in the lower mantle. Unlike
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
An application of normal mode theory to the retrieval of structural parameters and source mechanisms from seismic spectra
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