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1947 Wisconsin earthquake
The 1947 Wisconsin earthquake took place on May 6, immediately south of Milwaukee at 15:25 (CST). It was the largest tremor to be historically documented in Wisconsin, but it was not recorded by seismographs.
== History ==
The area had been previously shaken by the 1909 Wabash River earthquake, causing damage assessed at VII (''Very Strong'') on the Modified Mercalli scale across the Wisconsin-Illinois border. Two earthquakes were also reported in the state in 1912. Shocks in 1919 and 1925, the first from Missouri and the latter from Canada, occurred over enormous zones and affected the entire region, though not seriously. Earthquakes struck Wisconsin again in 1937 and 1939.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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