|Magnitude 6.9 Mw|
Start date December 23, 1985
|Areas affected Canada|
|Similar 1925 Charlevoix–Kamouraska earthquake, 1988 Saguenay earthquake, 1949 Queen Charlotte, 1663 Charlevoix earthquake, 1732 Montreal earthquake|
The 1985 Nahanni earthquakes is the name for a continuous sequence of earthquakes that began in 1985 in the Nahanni region of the Northwest Territories, Canada. The largest of these earthquakes occurred on December 23, reaching 6.9 on the moment magnitude scale. This is one of the most significant earthquakes in Canada during the 20th century. The earthquakes had a long succession of aftershocks and jolts. The earthquakes amazed both the general public and the earth science community and have been felt in the Yukon, Alberta, Saskatchewan, British Columbia, and southeastern Alaska.