The 1944 Cornwall-Massena earthquake occurred on Tuesday, September 5, 1944, at roughly 12:40am EST in Massena, New York. It was registered as a magnitude 5.8 on the Richter scale and was felt for a great distance. This area is part of the Saint Lawrence River Valley and the seismically active zone known as the Saint Lawrence rift system. The earthquake is the second largest known in New York's recorded history.
The earthquake was felt as far away as New York City, Quebec City, Toronto, and Boston and caused roughly $2 million dollars in property damage. Several large aftershocks were felt in the general area, described as a low rumble followed by a loud bang.