Dictionary:Backus averaging

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{{#category_index:B|Backus averaging}} An effective-medium theory[1] used to upscale sonic-log data for synthetic seismogram manufacture. Involves harmonic averaging to find the anisotropic elastic parameters that characterize seismic-wave propagation at low frequencies in a layered medium.

Named for George Backus, brother of Milo Backus.


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  1. Backus, G., 1962. Long-wave elastic anisotropy produced by horizontal layering: J. Geoph. Res., 67(11), 4427.