An earthquake measuring 7.7 on the Richter scale hit Queen Charlotte Islands off the western coast of Canada Sunday, the US Geological Survey said. There were no immediate report of casualties or damage to property.
The epicentre, with a depth of 17.5 km, was 202 km southwest of Prince Rupert in Canada's British Columbia province, Xinhua reported.
According to government agency Natural Resources Canada, the quake hit 69 km west-southwest of Queen Charlotte City at 0304 GMT.
The quake was felt across much of north-central British Colombia, said the agency, which measured the quake at 7.1 magnitude.
Queen Charlotte Islands, now known as Haida Gwaii, consist of two main islands. The sparsely populated area is home to nearly 4,000 people.