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1925 Charlevoix–Kamouraska earthquake

From Wikipedia, the free encyclopedia

1925 Charlevoix–Kamouraska earthquake
1925 Charlevoix-Kamouraska earthquake damage.jpg
UTC time1925-03-01 02:19:20
ISC event910394
USGS-ANSSComCat
Local dateFebruary 28, 1925 (1925-02-28)
Local time09:19:20 [1]
Magnitude6.2 Mw
Depth10 km (6 mi)
Epicenter47°48′N 69°48′W / 47.8°N 69.8°W / 47.8; -69.8
Areas affectedCanada
Max. intensityVIII (Severe)
Aftershocks55

The 1925 Charlevoix–Kamouraska earthquake struck northeastern North America on February 28, reaching 6.2 on the moment magnitude scale.[1] It was one of the most powerful measured in Canada in the 20th century,[1] with a maximum perceived intensity of VIII (Severe) on the Mercalli intensity scale at its epicentre in the area of Charlevoix-Kamouraska along the Saint Lawrence River near île aux Lièvres and not greater than VI (Strong) in the United States.[2] The quake was felt in Quebec, Shawinigan, Montreal, as far south as Virginia, and as far west as the Mississippi River.[3]

Damage

It caused damage in three separate areas. The first had extreme damage constricted to a narrow belt 20 miles (32 km) long on both shores of the Saint Lawrence River near the epicentre.[4] In this area, damage at the villages of Baie-Saint-Paul, Saint-Urbain, Les Éboulements, Pointe-au-Pic, La Malbaie, Tadoussac and the other nearby villages of Sainte-Anne-de-la-Pocatière, Saint-Pacôme, Rivière-Ouelle, Saint-Philippe, Saint-Denis, and Saint-Pascal on the south shore, was mostly related to the magnitude of the earthquake itself, and to some extent by the deep grainy soil on which many of the destroyed buildings were built.[4] The two other damaged areas were Quebec City and in the Trois-RivièresShawinigan area, where the destruction was more extensive, not so much due to the strength of the earthquake, but rather to the uneven nature of the landscape.[4]

Aftermath

A total of 55 aftershocks were recorded, which lasted for weeks, ranging from magnitude 5 to 2.[5] Over the years, several studies were published on the 1925 Charlevoix–Kamouraska earthquake, some as recently as 1999.[1] A foreshock occurred in the St. Lawrence valley the prior year on September 30. It was rated at 6.1 and was felt from Rockland, Ontario to Portland, Maine.[6]

See also

References

  1. ^ a b c d "The 1925 Charlevoix-Kamouraska earthquake". Natural Resources Canada. Retrieved 2012-03-04.
  2. ^ Coffman & von Hake 1970, p. 10
  3. ^ "Intensity of the 1925 Charlevoix-Kamouraska Earthquake". Natural Resources Canada. Archived from the original on 2012-07-07. Retrieved 2012-03-04.
  4. ^ a b c "Damage caused by the 1925 Charlevoix-Kamouraska earthquake". Natural Resources Canada. Archived from the original on 2013-01-01. Retrieved 2012-03-04.
  5. ^ "Aftershocks from the 1925 Charlevoix-Kamouraska earthquake". Natural Resources Canada. Archived from the original on 2012-07-08. Retrieved 2012-03-04.
  6. ^ Coffman & von Hake 1970, pp. 11, 15
Bibliography

External links

This page was last edited on 29 May 2020, at 00:08
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