1855 and 1991 Surveys of the San Andreas Fault: Implications for Fault Mechanics
Two monuments from an 1855 cadastral survey that span the San Andreas fault in the Carrizo Plain have been right-laterally displaced 11.0 ± 2.5 m by the 1857 Fort Tejon earthquake and associated seismicity and afterslip. This measurement confirms that at least 9.5 ± 0.5 m of slip occurred along the main fault trace, as suggested by measurements of offset channels near Wallace Creek.
Grant, L.B. and Donnellan, A., 1994, 1855 and 1991 surveys of the San Andreas Fault; implications for fault mechanics: Bulletin of the Seismological Society of America, v. 84, p. 241-246.