Great Lakes tectonic zone southern Ontario. Several earthquakes have been documented in Minnesota in the last 120 years, with at least six in the GLTZ. The epicenters show a clear relationship to tectonic features of the state; four epicenters lie along the Great Lakes tectonic zone. Depths are estimated at . The best-documented event occurred on July 9, 1975, near Morris, Minnesota, with a magnitude of 4.6, and a felt area of covering parts of four states. Wisconsin has had no earthquakes along the GLTZ, Michigan's Upper Peninsula has had four earthquakes in the vicinity of the GLTZ – Negaunee, Newberry and two in
Marine Museum of the Great Lakes Marine Museum of the Great Lakes The Marine Museum of the Great Lakes moved from the 1892 Kingston Dry Dock, a national historic site in Kingston, Ontario, Canada, when the federal government sold the property in 2016. The museum galleries are closed and the collections have been moved into storage until the museum finds a new property to reopen to the public. The Marine Museum office has moved to 53 Yonge Street, Kingston, Ontario. Once an important construction and repair facility for ships on the Great Lakes, the Kingston Dry Dock was constructed in 1890 by the Canadian federal government