Abstract
It is shown that a scheme to solve the 2-D eikonal equation by a finite-difference method can violate causality for moderate to large velocity contrasts (V2/V1 > √2). As an alternative, a finite-difference scheme is presented in which the solution region progresses outward from an "expanding wavefront' rather than an "expanding square', and therefore honors causality. Our method appears to be stable and reasonably accurate for a variety of velocity models with moderate to large velocity contrasts. The penalty is a large increase in computational cost and programming effort. -Authors
Original language | English (US) |
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Pages (from-to) | 478-487 |
Number of pages | 10 |
Journal | Geophysics |
Volume | 57 |
Issue number | 3 |
State | Published - 1992 |
Externally published | Yes |
ASJC Scopus subject areas
- Geochemistry and Petrology