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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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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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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