 As Laurentia and the micro-continent Avalonia deformed and raised the sedimentary deposits and volcanic rocks and created a second chain of mountains, the Acadian Chain, which superposes itself on the Taconic Chain.The estuary of the Saint Lawrence river in front of the Charlevoix region is one of the most active seismic regions in the east of Canada.Five earthquakes of a magnitude superior to 6 have occurred in history, in February 1663, December 1791, October 1860, October 1870 and February 1925.