Preliminary Determination of Pacfic-North America Relative Motion in the Southern Gulf of Calfornia Using the Global Positioning System

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Global Positioning System (GPS) data from experiments conducted in 1985 and 1989 in the southern Gulf of California, Mexico, allow a determination of relative motion between the Pacific and North American plates. The data indicate motion of Cabo San Lucas on the Pacific plate relative to North America at a rate of 47±7 mrn/yr and azimuth of 57±6° west of north (1σ errors), equivalent within uncertainties to the NUVEL-1 global plate motion model.

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Geophysical Research Letters, v. 18, issue 5, p. 861-864