Seismic velocity map of North America (IMAGE)

University of Texas at Austin

Seismic velocity map of North America

Caption

Seismic waves pass through different geological features at different speeds. This map shows seismic speed in the Earth’s crust at 200 kilometers depth across the continental United States and portions of Central America and Canada. The North American craton (outlined in black dashes) has a high seismic velocity compared to its surroundings. 

Credit

Nature Geoscience, Hua et al.

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