DMS Products: Metadata: Tags: reference-earth-model

Number of products tagged with reference-earth-model (7).

EMC-ak135-f ak135-f velocity model, ak135 full model

ak135-f is a variant of the ak135 velocity model, Kennett, Engdahl & Buland (1995) , which is obtained by augmenting it with the density and Q model of Montagner & Kennett (1995) .

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EMC-iasp91 iasp91 velocity model

The iasp91 reference model is a parameterised velocity model that has been constructed to be a summary of the travel time characteristics of the main seismic phases, Kennett (1991).

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EMC-MC35 A 1-D modified PEM-C S velocity model

MC35 reference Earth model is based on the continental Earth model PEM-C . MC35 replaces PEM-C ‘s high- and low-velocity zones of the uppermost mantle (to the depth of 210 km) with a constant shear-wave velocity of 4.5 km/s.

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EMC-PEM Parametric Earth Models

Parametric Earth Models (PEM) — Three models (Average, Continental & Oceanic) that were introduced by Dziewonski, Hales and Lapwood (1975) for which the radial variations of density and velocity are represented by piecewise continuous analytical functions of radius. All three models are identical below a depth of 420 km.

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EMC-ReferenceModels IRIS EMC - Reference Earth Models

Most of the EMC Earth models are expressed as perturbations relative to a particular 1-D reference Earth model. This page provides access to some reference Earth models that are hosted by EMC or hosted externally.

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EMC-STW105 Reference Earth Model also known as REF

STW105 (also known as REF) is a transversely isotropic reference Earth model, Kustowski, Ekstrom and Dziewonski (2008).

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EMC-TNA_SNA Average of the TNA and SNA models

An average of the TNA (Tectonic North America) and SNA (Shield North America) S velocity models of Grand and Helmberger (1984)

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