1855 and 1991 Surveys of the San Andreas Fault: Implications for Fault Mechanics

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Date Published: 
April 1994

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.

Reference Information: 

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.

Cited In: 
GPO - Appendix I

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