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1944 Cornwall–Massena earthquake
The 1944 Cornwall–Massena earthquake occurred on September 5 at 12:38:45 am EDT in Massena, New York. It registered 5.8 on the moment magnitude scale and had a maximum Mercalli Intensity of VII (''Very Strong''). 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 largest known in New York's recorded history and was felt over a great distances.
==Damage==
The earthquake was felt as far away as New York City, Quebec City, Toronto, and Boston and caused roughly $2 million in property damage. Several large aftershocks were felt in the general area, described as a low rumble followed by a loud bang.
In the village of Massena, New York, approximately 90 percent of its chimneys were destroyed or damaged, along with heavy damage to masonry structures. It was also reported that cracks appeared in the ground around the town of Hogansburg, located 10 miles east of Massena. There were also reports of wells that dried up, and a crack in a deep alluvium north of Massena Center oozed water and sand.
Damage to the city of Cornwall, Ontario, was heavier due to a denser population and its geological location; many structures' foundations were built on sand. Cornwall Collegiate and Vocational School received heavy damage from masonry work falling through the roof of the gymnasium.
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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