The U.S. Geological Survey (USGS) has reported a magnitude 4.9 quake occurred at 4:28 a.m. PT Friday.
This is the second earthquake that has shocked the area off northwestern Vancouver Island since Wednesday.
It was centred 158 kms southwest of Port Hardy off the west coast of the Island and was at a depth of 10 kilometres.
A magnitude 4 quake, especially at 4.7 and above, is strong enough to make walls creak and hanging objects swing, according to the Earthquakes Canada website.
But the site says earthquakes of this magnitude are not expected to cause major damage or injuries.