**Acknowledgements**

This research was supported by the Natural Sciences and Engineering Research Council of Canada under the Discovery Grant program. We gratefully acknowledge the book editor Dr. Walter Salazar for INTECHOPEN LIMITED, and Dr. John Adams at Natural Resources Canada for their constructive comments, suggestions, and text revisions. The waveform records were processed using SAC, *redseed,* and *geotool* programs. The location program *HYPOCENTER* in the SEISAN program package was used; **Figure 1** was prepared using the software GMT [3].
