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- Magnitude: M W 5.9; m b 5.9; m N 6.5; M S 5.8 Maximum Intensity: Modified Mercalli VIII Latitude: 48.12° N Longitude: 71.18° W Depth: 28 km Preceded by a magnitude 4.7 foreshock on November 23, 1988, 4:11 am Eastern time
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On Friday November 25, 1988 the largest earthquake in eastern North America in 53 years occurred 35 km south of Chicoutimi, Québec and 75 km north of the Charlevoix-Kamouraska earthquake zone. This earthquake, referred to as the Saguenay earthquake, was located in a relatively aseismic region.
The 1988 Saguenay earthquake struck Quebec, Canada with a moment magnitude of 5.9 on November 25. It is one of the largest recorded earthquakes in eastern Canada and eastern North America during the 20th century. The earthquake was felt by millions, and damaged some buildings.
- November 25, 1988
- Canada
- 1988-11-25 23:46:04
- 5.9'"`UNIQ--templatestyles-00000003-QINU`"'Mw
This earthquake, referred to as the Saguenay earthquake, was located in a relatively aseismic region, had a calculated magnitude of 5.9 mb, 6.5 MN, and a depth of 29 km. It was characterized by a single foreshock, relatively minor aftershock activity, and a large amount of high frequency energy.
The Saguenay earthquake of 25 November 1988 occurred close to the southern margin of the Saguenay Graben in southern Quebec. It was caused by almost purely dip-slip faulting centered at a depth of 26 km with a P axis oriented northeast-southwest.
- Paul G. Somerville, James P. McLaren, Chandan K. Saikia, Donald V. Helmberger
- 1990
A magnitude 6.6 earthquake located near the North Nahanni River in the Northwest Territories triggered an immense rock avalanche containing an estimated 5 million to 7 million cubic metres of rock. Half a square kilometre of mountainside became detached and trees and automobile-sized blocks of rock slid 1.5 kilometres down a narrow valley.
The November 25, 1988, magnitude 5.9 (Mw) Saguenay earthquake was the largest event to take place in Eastern North America since the M 6.2 Temiscaming earthquake of 1935. Its epicenter was located in the Laurentide Fauna Reserve of Quebec, about 35 km to the south of the city of Chicoutimi (now a
The November 25, 1988 Saguenay, Québec earthquake (m b 5.9) was preceded by a foreshock 62 hours earlier (m b 4.4) and followed by over 50 aftershocks, of which only two have been larger than magnitude 3. The unusually large 29 km depth of the main shock is well determined using a field network deployed after the foreshock.
