There was a 6.0 magnitude earthquake 127.3 km west-southwest of Adak, Alaska.
It occurred on Sunday at 7:01 pm local time at a depth of 27 km.
The U.S. Tsunami Warning Center said that a tsunami was not expected.
There were several smaller earthquakes off the coast of British Columbia after that.
A 3.3 magnitude earthquake struck 204 km west of Port Hardy.
In neither event was there any injuries or damage.