Please cite:
d'Alessio, M. A., Johanson, I. A., Bürgmann, R., Schmidt, D. A., and M. H. Murray. 2005. Slicing up the San Francisco Bay Area: Block kinematics and fault slip rates from GPS-derived surface velocities. Journal of Geophysical Research, v. 110, doi: 10.1029/2004JB003496.

Please email for a free e-print.

Bay Area Motions
Velocities relative to LUTZ, a site indicated by the yellow rectangle on the Bay block. Arrows move in opposite direction on either side, clearly illustrating right-lateral motion across the plate boundary.

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Bay Area Motions
Velocities relative to Stable North America. Arrows all point same direction because Bay Area is all moving northwest relative to North America, but by different amounts across the region.

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Pacific-Sierra Nevada/Great Valley Reference Frame
Bay Area rotated on its side so that velocities parallel to the relative motion between the Pacific plate and the SNGV block are perfectly horizontal.
Velocities relative to LUTZ.

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