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- W2315015500 abstract "Prestack Kirchhoff migration using first‐arrival traveltimes has been shown to produce poor images in areas of complex structure. To avoid this problem, I propose a new method for calculating traveltimes that estimates the traveltime of the maximum energy arrival, rather than the first arrival. This method estimates a traveltime that is valid in the seismic frequency band, not the usual high‐frequency approximation. Instead of solving the eikonal equation for the traveltime, I solve the Helmholtz equation to estimate the wavefield for a few frequencies. I then perform a parametric fit to the wavefield to estimate a traveltime, amplitude, and phase. The images created by using these parameters in a Kirchhoff imaging algorithm are comparable in quality to those created using full‐wavefield, finite‐difference, shot‐profile migration." @default.
- W2315015500 created "2016-06-24" @default.
- W2315015500 creator A5041543878 @default.
- W2315015500 date "1994-01-01" @default.
- W2315015500 modified "2023-09-25" @default.
- W2315015500 title "Maximum energy traveltimes calculated in the seismic frequency band" @default.
- W2315015500 cites W2008872914 @default.
- W2315015500 doi "https://doi.org/10.1190/1.1822789" @default.
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