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Figure 3 – (a) Time structure map of the base Oligocene corresponding to the blue pick in figure 2. These picks corresponded to a trough. (b) Horizon slice through seismic amplitude, where the values are mostly negative, consistent with the trough pick. (c) Horizon slice through instantaneous phase without vector interpolation. Since we picked a trough corresponding to φ = ±180 degrees, the interpolation is highly inaccurate, resulting in a useless image. Notice how the interpolation creates erroneous values beyond ±200 degrees. (d) Horizon slice through instantaneous phase using the vector interpolation algorithm described by equation 2. Here, the phase appears to be purple, corresponding to φ = ±180 degrees. The anomalous phase values correspond to radial faults associated with the volcanic plug. There are very few artifacts in linearly interpolating the phase about a peak. Note the white arrows show improvement of artifacts.
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Figure 3 – (a) Time structure map of the base Oligocene corresponding to the blue pick in figure 2. These picks corresponded to a trough. (b) Horizon slice through seismic amplitude, where the values are mostly negative, consistent with the trough pick. (c) Horizon slice through instantaneous phase without vector interpolation. Since we picked a trough corresponding to φ = ±180 degrees, the interpolation is highly inaccurate, resulting in a useless image. Notice how the interpolation creates erroneous values beyond ±200 degrees. (d) Horizon slice through instantaneous phase using the vector interpolation algorithm described by equation 2. Here, the phase appears to be purple, corresponding to φ = ±180 degrees. The anomalous phase values correspond to radial faults associated with the volcanic plug. There are very few artifacts in linearly interpolating the phase about a peak. Note the white arrows show improvement of artifacts.