Data Services Products: Metadata: Tags: tna-sna

Number of products tagged with tna-sna (2).

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-TNA_SNA An 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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