The 1933 Baffin Bay earthquake struck
Greenland
Greenland is an autonomous territory in the Danish Realm, Kingdom of Denmark. It is by far the largest geographically of three constituent parts of the kingdom; the other two are metropolitan Denmark and the Faroe Islands. Citizens of Greenlan ...
and the
Northwest Territories
The Northwest Territories is a federal Provinces and territories of Canada, territory of Canada. At a land area of approximately and a 2021 census population of 41,070, it is the second-largest and the most populous of Provinces and territorie ...
(now
Nunavut
Nunavut is the largest and northernmost Provinces and territories of Canada#Territories, territory of Canada. It was separated officially from the Northwest Territories on April 1, 1999, via the ''Nunavut Act'' and the Nunavut Land Claims Agr ...
),
Canada
Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
with a
moment magnitude of 7.4
at on November 20.
The main shock
epicenter
The epicenter (), epicentre, or epicentrum in seismology is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates.
Determination
The primary purpose of a ...
was located in
Baffin Bay
Baffin Bay (Inuktitut: ''Saknirutiak Imanga''; ; ; ), located between Baffin Island and the west coast of Greenland, is defined by the International Hydrographic Organization as a marginal sea of the Arctic Ocean. It is sometimes considered a s ...
on the east coast of
Baffin Island
Baffin Island (formerly Baffin Land), in the Canadian territory of Nunavut, is the largest island in Canada, the second-largest island in the Americas (behind Greenland), and the fifth-largest island in the world. Its area is (slightly smal ...
. Shaking was only felt at the small town of
Upernavik
Kanunarinaqiniiaaq (known as Upernavik) is a small town in the Avannaata municipality in northwestern Greenland, located on a small island of the same name. With 1,064 inhabitants as of 2024, it is the twelfth-largest town in Greenland. It c ...
, Greenland. The event is the largest recorded earthquake to strike the passive margin of
North America
North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
and is the largest north of the
Arctic Circle
The Arctic Circle is one of the two polar circles, and the northernmost of the five major circle of latitude, circles of latitude as shown on maps of Earth at about 66° 34' N. Its southern counterpart is the Antarctic Circle.
The Arctic Circl ...
. No damage was reported because of its offshore location and the small population of the nearby onshore communities.
Tectonic setting
Canada is not typically associated with seismic activity, however, Canada does experience infrequent large earthquakes. At the location of the earthquake, there is an extinct spreading center which formed the Baffin Bay itself. This passive margin is seismic, and occasionally reactivates in a
strike-slip
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic ...
manner.
[
]
Regional seismicity
The region around northwestern Baffin Bay and northeastern Baffin Island continues to be seismically active.
See also
* List of earthquakes in 1933
* List of earthquakes in Canada
References
Sources
*
*
External links
*
Earthquakes in Canada
Natural disasters in Nunavut
Natural history of Nunavut
Earthquakes in North America
Natural disasters in Greenland
1933 earthquakes
1933 disasters in Canada
November 1933 in Canada
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