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
Great Lakes Paper Great Lakes Paper The Great Lakes Paper Company was the operator of the largest and most modern pulp and paper manufacturing facility in the world. The Company employed over 4,000 in Northern Ontario, starting in 1924 as a pulp mill at Fort William, Ontario (now Thunder Bay, Ontario Canada). Great Lakes had a highly developed social network within the company, including a children's Christmas party held at a local arena, and an annual picnic held at a local park, as well as many sports teams and other social groups. The company's working environment was enhanced by cultural diversity. For example