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EARTHQUAKE IN SAN FRANCISCO, APRIL 18, 1906

Fault Trace Breaks Fence NW of Woodville

FAULTING About one kilometer northwest of Woodville on the E.R. Strain farm this fence was offset 2.6 m by the main fault. Note the swerve in the fence as it approaches the fault-trace. The total displacement of the straight portions of the fence is about 3.3 m. On the Shafter ranch a crevice momentarily opened wide enough to admit a cow and then immediately closed leaving only the cow's tail visible. In this area the fault-trace was a trench more than 2 m wide filled with broken soil blocks. Photograph credit: U.S. Geological Survey.