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From CSDMS
SNAC: crustal deformation
SNAC models crustal dynamics, it is developed by Eun-seo Choi, who is presently at Lamont-Doherty Earth Observatory. Choi and co-workers used SNAC to show that orthogonal topographic and fault patterns characteristic of mid-ocean ridge surfaces can be explained by the competing tension of cooling of young oceanic crust and spreading. Explicit Lagrangian, finite-difference description of motion adopted in SNAC makes it easy to monitor surface deformation during a crustal or continental-scale tectonic event which influences other earth surface processes.
