Well, I found this page:
http://www.ngdc.noaa.gov/seg/hazard/int_srch.shtml
Putting in Calgary, Alberta, I got the a chart that doesn't seem to
copy well into here. It did list the following:
6.3 (Oct 19, 1935, 4:48AM)
6.0 (Oct 31, 1935, 6:37PM)
7.1 (Aug 8, 1959, 6:37AM)
Edit: It also doesn't look like the likelyhood of an earthquake in
Calgary or Alberta is very high.
http://seismescanada.rncan.gc.ca/hazard/simphaz_e.php
ers