Long and short term deformation along the San Andreas Fault Examples of issues of spatial and temporal scale of interest. Also indicates rate of deformation.

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Presentation transcript:

Long and short term deformation along the San Andreas Fault Examples of issues of spatial and temporal scale of interest. Also indicates rate of deformation.

Areas of contrasting behavior along the San Andreas Fault (from Allen, 1968) Carrizo Plain

1906 M7.8 San Francisco Earthquake Beginning of modern earthquake science

1906 earthquake surface rupture. 8’ fence offset above enter/1906EQ/1906thumb.html And ages/fenceoffset_big.html ages/fenceoffset_big.html

“Reid’s elastic rebound hypothesis

Edge dislocation Screw dislocation Dislocation: simple idealization of displacement discontinuity in continuous body

Idealization of brittle crust with embedded strike slip fault (Thatcher, 1990)

Strike-slip parallel displacements from simple screw dislocation model (Thatcher, 1990)

1906 coseismic displacements

Best fit depth: 7000 m

Young, et al., 2001

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