Two ways to run disper

Program disper is usually run to compute Rayleigh wave dispersion for a layered earth model. The resulting dispersion curves are written to a file which can be read by program waves to compute a synthetic seismogram. There is also a listing file, disper.tmp which can be examined for phase velocities computed at each frequency, for all possible modes up to 9 modes. Octave programs are also generated to plot the phase velocity dispersion, and even the layered earth model.

The other way to run disper is to examine the above type of run listing file, and choose a phase velocity at a frequency of interest for a mode of interest. These values can be inserted into the disper.d namelist file for computation of the motion-stress vectors. In that case, a Octave program will be generated for plotting the vectors. See section 7.3.5.1 below.