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Conventional approaches follow the left-hand 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 so-called 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.
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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
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