RNGCHN: a program to calculate displacement components from dislocations in an elastic half-space with applications for modeling geodetic measurements of crustal deformation
Kl. Feigl et E. Dupre, RNGCHN: a program to calculate displacement components from dislocations in an elastic half-space with applications for modeling geodetic measurements of crustal deformation, COMPUT GEOS, 25(6), 1999, pp. 695-704
The RNGCHN program calculates a single component of the displacement field
due to a finite or point-source dislocation buried in an elastic half space
. This formulation approximates the surface movements produced by earthquak
e faulting or volcanic intrusion. As such, it is appropriate for modeling c
rustal deformation measured by geodetic surveying techniques, such as spiri
t leveling, trilateration, Very Long Baseline Interferometry (VLBI), Global
Positioning System (GPS), or especially interferometric analysis of synthe
tic aperture radar (SAR) images. Examples suggest that this model can fit s
imple coseismic earthquake signatures to within their measurement uncertain
ties. The program's input parameters include fault position, depth, length,
width, strike, dip, and three components of slip. The output consists of d
isplacement components in the form of an ASCII list or a rectangular array
of binary integers. The same program also provides partial derivatives of t
he displacement component with respect to all 10 input parameters. The FORT
RAN source code for the program is in the public domain and available as th
e compressed tar file rngchn.tar.Z in the directory/pub/GRGS via the Intern
et by anonymous ftp to spike.cst. cnes.fr. This distribution includes worke
d examples and a MATLAB interface. (C) 1999 Elsevier Science Ltd. All right
s reserved.