Conventional approaches follow the lefthand track, directly
translating displacement data into a slip model through some inversion procedure based on the theory of
elasticity.
PCAIM divides up the displacement data into
the sum of socalled principal components. Each of the components is individually modeled and
translated into a corresponding principal dislocation model. Note that the principal dislocation model associated to
any one particular component does necessarily correspond to a single elementary geophysical source.

PCAIM takes
advantage of the linearity of the formulation that converts a source of deformation at depth (slip on a fault, for example) into surface displacement (based on
the theory of linear elasticity). It makes it possible to retrieve a source model by linear
combination of the principal dislocation models derived from the inversion of each component.
For more detail, see publication
