Risks in Montreal. Montreal is in the Western Québec Seismic Zone, which extends from Montreal to Témiscamingue and the Laurentians east of Ontario. It is considered the second most vulnerable city for earthquakes, after Vancouver, because of its high population density and type of soil.
http://ville.montreal.qc.ca/portal/page?_pageid=9657,125803622&_dad=portal&_schema=PORTAL