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Discussion and Conclusions

From our results, we see that receiver-by-receiver shifting is better than bulk shifting as it produces larger signal amplitude and overlap as demonstrated by the higher amplitudes of the stacked reflections. We note that fractional shifting did not help much to improve alignment in these examples, that is, whole samples were sufficient, but we will continue to use this method in order to develop and mature it for general application to microseismic data that may well need fractional shifting for sufficient alignment.

Finally, although shear reflections are sufficient for imaging, that fact that we were able to identify later P-arrivals that encourages us to not abandon our search for P-reflections.