1935 Timiskaming earthquake
|Date||November 1, 1935|
|Depth||10 km (6.2 mi)|
|Max. intensity||VII (Very strong)|
The 1935 Temiskamingue earthquake occurred on November 1 with a moment magnitude of 6.1 and a maximum Mercalli intensity of VII (Very strong). The event took place in the Western Quebec Seismic Zone in the Abitibi-Témiscamingue region of Quebec.
The earthquake had its epicentre on a thrust fault in the Ottawa-Bonnechere Graben, approximately 10 kilometres north east of Témiscamingue, and occurred at 1:03 a.m. ET. The earthquake was felt over a wide swath of North America, extending west to Fort William (now Thunder Bay), east to Fredericton, New Brunswick, north to James Bay and south as far as Kentucky and West Virginia. Occasional aftershocks were reported for several months.
Although the most significant damage connected to the earthquake was to chimneys, both in the immediate area and as far south as North Bay and Mattawa, a railroad embankment near Parent, 300 km away, also collapsed. Researcher E. A. Hodgson later concluded that the embankment slide was already imminent, and was merely hastened by the vibrations. Some rockfalls and structural cracks were also reported, although there were few major structural collapses aside from the Parent embankment. The relative lack of major damage, despite the fact that it was a strong earthquake, has been attributed primarily to the sparseness of the area's population.
- The Temiskamingue Earthquake of November 1, 1935. The Location of the Epicentre and Determination of Focal Depth. Hodgson, E. A. Journal of the Royal Astronomical Society of Canada, 1936, Vol. 30, pp.120
- Hodgson, Ernest A. (1937) "Progress Report on the Research Connected with the Timiskaming Earthquake of November 1, 1935" Earthquake Notes 8: p. 76
- Adams, J.; Vonk, A. (2009), The November 1, 1935, M 6.2 Timiskaming earthquake, its aftershocks, and subsequent seismicity (PDF), Open File 6207, Geological Survey of Canada