| Description |
The Okada [1985] model allows to calculate analytic solution for surface deformation due to shear and tensile faults in an elastic half-space. This model is widely used to simulate ground deformation produced by local perturbation like tectonic faults (earthquakes) or volcanic dykes. Given rectangular fault geometry (length, width, depth, strike, dip) and 3-component dislocation amplitude, it computes the displacements, tilt and horizontal strain on the free-surface.
The proposed Matlab script is a literal transcription of the Okada's equations, except that it proposes a strike angle of the fault, dislocation parameters are given by: rake, slip and opening (instead of U1, U2, U3), following Aki & Richards [1980] definition, and coordinates are relative to fault centroid. Lamé's constants λ and μ are also replaced by Poisson's ratio ν, since the equations are independent of other elastic parameters. The equations are also vectorized for (x,y) coordinates. See help for syntax, and script comments for details. |
