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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 on theme: "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."— Presentation transcript:

1 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.

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

3 1906 M7.8 San Francisco Earthquake Beginning of modern earthquake science

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5 1906 earthquake surface rupture. 8’ fence offset above http://mnw.eas.slu.edu/Earthquake_C enter/1906EQ/1906thumb.html And http://quake.wr.usgs.gov/info/1906/im ages/fenceoffset_big.html http://quake.wr.usgs.gov/info/1906/im ages/fenceoffset_big.html

6 “Reid’s elastic rebound hypothesis http://quake.wr.usgs.gov/info/1906/reid.html

7 http://www.matter.org.uk/matscicdrom/manual/di.html Edge dislocation Screw dislocation Dislocation: simple idealization of displacement discontinuity in continuous body

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

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

10 1906 coseismic displacements

11 Best fit depth: 7000 m

12 Young, et al., 2001

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