long and short term deformation along the san andreas fault examples of issues of spatial and...
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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.
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
http://mnw.eas.slu.edu/Earthquake_Center/1906EQ/1906thumb.htmlAnd http://quake.wr.usgs.gov/info/1906/images/fenceoffset_big.html
“Reid’s elastic rebound hypothesis
http://quake.wr.usgs.gov/info/1906/reid.html
http://www.matter.org.uk/matscicdrom/manual/di.html
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