Creep at San Juan Bautista, California

A straight line of nails (red dots) was originally placed perpendicularly across the San Andreas fault (black dots) at this location in 1967. UCSB geologists commenced measuring the systematic displacement in 1978.

 

View north of nail line and right bend in fence line, Sept. 1978.

 

View south of the nail line 28 Oct. 1989. View south of nail line 30 June 1993.

 

View southwest along right-laterally bent fence across the San Andreas fault. View southwest along right-laterally bent fence across the San Andreas fault

 


Arthur G. Sylvester
sylvester@geol.ucsb.edu
Department of Geological Sciences
University of California
Santa Barbara, CA 93106