- 1.
**Inconsistency with multiple order**- After imaging, corresponding crosstalk events on two model panels have different residual moveout, e.g. residual first-order multiples on and residual second-order multiples on . The moveout difference is negligible at near offsets, but larger than the Fresnel Zone (half a wavelength) at long offsets. Conversely, actual signal events are flat on all the .**Conclusion:**For fixed (*t*,*x*), the difference between one model panel and another will be relatively small where there is signal, but large where there is crosstalk noise, especially at far offsets.- 2.
**Curvature with offset**- After imaging, signal events are flat, while crosstalk events have at least some residual curvature, especially at far offsets and in regions with a strong velocity gradient.**Conclusion:**Provided that the AVO response of the signal changes slowly with offset, the difference (in*x*) between adjacent samples of any will be relatively small where there is signal, but large where there is crosstalk noise.- 3.
**Predictability of ``pre-seabed multiple'' events**- The third discriminant exploits the inherent predictability of crosstalk to suppress it. Between the seabed reflection and the onset of its first multiple, the recorded data contains only primaries (inter-bed multiples and locally-converted shear waves are generally weak); these strong events spawn the (usually) most troublesome crosstalk events. Fortunately, the pre-seabed-mutiple primaries can be used to directly construct a prior model of the crosstalk noise, valid even at near offsets.**Conclusion:**Given an accurate kinematic model of crosstalk noise, a corresponding set of model-space weights used in a model regularization term penalizes crosstalk events but not signal.

- Model Regularization 1: Differencing across multiple order
- Model Regularization 2: Differencing across offset
- Model Regularization 3: Crosstalk-boosting weighting
- Combined Data and Model Residuals

7/8/2003