The figure above left shows semblance and gathers plots with a possible S-wave reflection event (Sr) flagged. The figure above right shows the same data with Normal Move Out (NMO) correction applied at constant 1,100 m/s S-wave velocity. Note the changes in Amplitude Versus Offset (AVO).
The figure lower left shows a second data set acquired with a smaller (2.5 mm) trace interval to avoid the spatial aliasing seen in the upper plots. The lower right figure shows the semblance and 'CMP' gather for the new data set. |
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