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What's New

1964 Postseismic Velocity Predictions from Suito and Freymueller (2009)

GPS Velocity Field from Freymueller et al. (2008)


Alaska GPS 3D Velocities from Snay et al. (2016)

Revised October 31, 2018

This page provides access to the electronic supplement data files for my paper, Modeling 3-D crustal velocities in the United States and Canada which was published in Journal of Geophysical Research. The full reference for the paper and the data is given below:

Snay, R. A., J. T. Freymueller, M. R. Craymer, C. F. Pearson, and J. Saleh (2016), Modeling 3-D crustal velocities in the United States and Canada, J. Geophys. Res. Solid Earth, 121, doi:10.1002/2016JB012884.

Latest velocity files:
3D GPS velocities relative to North America
Horizontal velocities relative to North America (GMT format)
Vertical GPS velocities

GPS3d File Format:
The GPS3d data file is organized in a column-based format, with the columns separated by whitespace. Like this:
2201 -150.551 59.524905 362.531500 -0.592462 1.182820 0.720698 0.045364 0.054276 0.049012
The columns are: station name, longitude, latitude, elevation, east, north, vertical, east sigma, north sigma, vertical sigma. Velocities are in cm/yr.

Note that the uncertainties in the velocities relative to North America include the uncertainty in the definition of the North American frame. Details are given in the paper.

Dr. Jeffrey T. Freymueller
Professor of Geophysics, Endowed Chair for Geology of the Solid Earth
Department of Earth and Environmental Sciences
Michigan State University
288 Farm Lane, Rm 207
East Lansing, MI 48824

Phone 517-253-0433
Office 011 NatSci