SUSIE: A program for inverse strain estimation from magnetic susceptibility

SUsceptibility–Strain Inverse Estimation (SUSIE) is a Matlab program for the inversion of magnetic susceptibility to irrotational strain. Input data are the bulk susceptibility principal values or their equivalent (magnetic parameters P and T), parameters of magnetic grains (shape, magnetic susceptibility, initial orientation, and rotational response to deformation). SUSIE estimates strain corresponding to input AMS data iteratively, by a repeated look-up table procedure that uses the map of P and T values computed in a coarse strain grid. Usually not more than two or three iterations are needed to obtain the strain estimate that satisfy up to two decimal places of the input P and T values. An example of the use of the program is given.