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The Parkfield, California, segment of the San Andreas fault is transitional in character between the creeping segment of the fault to the NW and the locked Carrizo Plain segment to the SE. The rate of shallow fault slip decreases from 25-30 mm/yr NW of the epicenter of the 1966 Parkfield earthquake to zero at the SE end of the 1966 rupture zone. Data from a network of trilateration lines spanning the San Andreas fault near Parkfield and extending to the Pacific coast near San Luis Obispo shed light on the rate of fault slip at depth since the 1966 earthquake. In this study, average rates of line length change and shallow fault slip were inverted to determine the slip rate at depth on the Parkfield fault segment. -from Authors
Additional Publication Details
Detection of a locked zone at depth on the Parkfield, California, segment of the San Andreas fault ( USA).