Notable Earthquake of the Week
Massena, New York M 5.6 earthquake

The northeastern United States and southeastern Canada have experienced several large magnitude earthquakes during the past three centuries from four principal seismic zones:

  • Western Quebec,
  • Charlevoix,
  • Lower St. Lawrence,
  • Northern Appalachians.

The Western Quebec seismic zone, which extends northwestward from Montreal and parallels the Ottawa River, has been rocked by three large magnitude earthquakes: ~M6.0, 1732; M6.2, 1935; and M5.6, 1944.

The September 16, 1732, ~M6.0 temblor registered violent shaking intensities of IX on the Modified Mercalli intensity scale and caused considerable damage in Montreal.

The Lake Timiskaming M6.2 temblor on November 1, 1935, was widely felt, but due the remote location, only minor damage was reported.

Although substantial damage occurred to schools and office buildings in Cornwall and Massena, New York, during a M5.6 earthquake on September 4, 1944, causalities were only minor as the strong temblor fortuitously happened on the Labor Day Holiday.

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