Dictionary:Dix formula

From SEG Wiki
Jump to: navigation, search
This page contains changes which are not marked for translation.

Other languages:
English • ‎español

For reflections from a sequence of flat, parallel isotropic layers and small offsets, the interval velocity in the nth layer can be recursively extracted from the stacking velocities, using


where and are the stacking velocities from the datum to reflectors above and below the layer and and are reflection arrival times. This formula is often misused to calculate interval velocities in situations that do not satisfy Dix's assumptions. Named for C. Hewitt Dix (1905 - 1984), American geophysicist. See Dix (1955) [1]. Some call this the Postma equation.


  1. Dix, C. H., 1955, Seismic velocities from surface measurements: Geophysics, 20, 68–86.

External links

find literature about
Dix formula
SEG button search.png Datapages button.png GeoScienceWorld button.png OnePetro button.png Schlumberger button.png Google button.png AGI button.png