Volume 24 Number 3
  • E-ISSN: 1365-2478



Various Dix‐type formulae are derived, which are useful to approximate travel time functions that can be observed while modeling the common depth point (CDP) technique for 3‐D isovelocity layers of varying dip and strike. All formulae can be used to compute interval velocities and recover the depth model from surface measurements. They are established by making use of the concept of wavefront curvature. Many similarities with known formulae valid for the 2‐D plane isovelocity layer case exist.


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  • Article Type: Research Article
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