Bridget Smith and David Sandwell
Institute of Geophysics and Planetary Physics
Scripps Institution of Oceanography
University of California, San Diego
La
Jolla, CA 92093-0225
Quick Contents
Selected Publications
Models
Selected Publications
- A Model of the Earthquake Cycle Along the San Andreas Fault System for the Past 1000 Years [Smith and Sandwell, 2006] (pdf)
- Bridget's Thesis: Three-dimensional Deformation and Stress Models: Exploring One-Thousand Years of Earthquake History Along the San Andreas Fault System [Ph.D. Dissertation, January 2005] (pdf, 6.5M)
- A 3-D Semi-analytic Viscoelastic Model for Time-dependent Analyses of the Earthquake Cycle [Smith and Sandwell, 2004] (pdf)
- Accuracy and Resolution of Shuttle Radar Topography Mission Data [Smith and Sandwell, 2003] (pdf)
- Coulomb Stress along the San Andreas Fault System [Smith and Sandwell, 2003] (pdf)
- San Andreas viscoelastic deformation model, 1800-2004 (.mov, 135 MB)
- San Andreas viscoelastic Coulomb stress model, 1800-2004 (.mov, 35 MB)
- San Andreas: Earthquake Machine (.mov, BIG 1.15 GB)
- San Andreas Fault System: A
1000-year Perspective of the Earthquake Cycle (.mov, 189 MB)
- Example viscoelastic models
- 1906 San Francisco Earthquake (to be featured in The National Geographic) [Fledermaus scene file, ctrl click to download]
- San Andreas Fault System Coulomb Stress Accumulation Rate [Fledermaus scene file, ctrl click to download]
- Fourier elastic half-space model derivation (pdf)
- Example source code (elastic half-space model) (tar)
- Fourier viscoelastic model derivation (pdf)
- Example source code (viscoelastic half-space model) (tar)
- Analytic and numeric tests
(pdf)
Models
Long-term
tectonic loading, instantaneous fault rupture, and transient
postseismic rebound are key components of the earthquake cycle that
expose important spatial and temporal chaaracteristics of crustal
deformation. In order to better understand such behavior, we have
developed semi-analytic elastic and viscoelastic (static and
time-dependent) models for 3-D displacement and stress caused by a
body-force dislocation. All solutions of the model are derived (and
computed) in the Fourier domain to exploit the speed of the convolution
theorem and thus horizontal complexity of a model fault system has no
effect on the speed of the computation. A single-depth computation
consisting of a horizontal grid of 2048x2048 elements, for example,
requires less than 40 seconds of CPU time on a Mac G5.
This
research was supported by the NASA Solid Earth and Natural Hazards
Program (NAGS - 9623), the NASA Earth System Science Fellowship Program
(ESSF - 0131), the NSF Earth Science Program (EAR - 0105896), and
the Southern California Earthquake Center (SCEC).
Institute of Geophysics and Planetary Physics
Scripps Institution of Oceanography
University of California, San Diego
Institute of Geophysics and Planetary Physics
Scripps Institution of Oceanography
University of California, San Diego