The earliest record of earthquake tremors in Michigan territory were in 1811 and 1812 when as many as nine tremors from a Missouri earthquake were felt in Michigan.
Several unusual occurances in the Keweenaw peninsula mining area form a significant part of the seismic history in Michigan. According to USGS, the first disturbance was on July 26, 1905 at about 6:20 in the evening. An explosion was heard far down in a mine and the shock was felt all over the Keweenaw Peninsula area and as far away as Marquette, about 70 miles southeast across Lake Superior. Ten months later, a similar phenomenon occured. Another shock was reported in the same area 3 years later.
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The largest earthquake to epicenter in Michigan was a 4.6 magnitude in 1947 that damaged southeast Michigan and was felt in Indiana, Illinois, Ohio, Wisconsin, and Ontario, Canada.
Several earthquakes centered outside the state have been felt in Michigan through the years. The last reported earthquake was in felt in 1994.