PCAIM- recovering the time-evolution history of surface deformation sources


How the Principal Component Analysis Inversion Method (PCAIM) method works:

flow chart snapshot

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.

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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