A rare earthquake, measuring magnitude-5.5, struck at the Ontario-Quebec border region of Canada on Wednesday, according to the U.S. Geological Survey.
The midday quake was felt in the city of Toronto in Canada and in a number of U.S. states, including Michigan, Vermont and New York.
There were no immediate reports of damage.
The USGS said the quake occurred at a depth of about 19.2 kilometres. The quake occurred at 1-41 p.m. EDT (1741 GMT).
In New York State, people from Buffalo to Albany and north to Massena on the St. Lawrence River said pets were startled and plates rattled when the quake hit.