This manual provides the physical and mathematical concepts for selected models used to interpret deformation measurements near active faults and volcanic centers. The emphasis is on analytical models of deformation that can be compared with data from the Global Positioning System (GPS) receivers, Interferometric synthetic aperture radar (InSAR), leveling surveys, tiltmeters and strainmeters. Source models include pressurized spherical, ellipsoidal, and horizontal penny-shaped geometries in an elastic, homogeneous, flat half-space. Vertical dikes and faults are described following the mathematical notation for rectangular dislocations in an elastic, homogeneous, flat half-space. All the analytical expressions were verified against numerical models developed by use of COMSOL Multyphics, a Finite Element Analysis software (http://www.comsol.com). In this way, typographical errors present were identified and corrected. Matlab scripts are also provided to facilitate the application of these models.
Additional Publication Details
USGS Numbered Series
Modeling crustal deformation: a catalog of deformation models and modeling approaches
Techniques and Methods
U.S. Geological Survey
Volcano Science Center-Menlo Park
Report: viii, 96 p.; Readme; dMODELS: Matlab Script; dMODELS: Matlab Scripts compiled for LINUX OS 64bit; dMODELS: Matlab Scripts compiled for Windos OS 32bit & 64bit