At least three tsunami waves have been reported on the British Columbia coast, following a 7.7-earthquake that struck near Haida Gwaii on Saturday night.

The waves have not caused any damage, but there have been evacuations in Haida Gwaii and Port Edward, near Prince Rupert. Officials say it's not clear how many people have been driven from their homes.

"It looks like the damage and the risk are at a very low level," Shirley Bond, British Columbia's minister responsible for emergency management said. "We're certainly grateful."

Kelly Kryzanowski of Emergency Management B.C. said an evacuation centre had been set up on Haida Gwaii.

"Power in some areas is sporadic. There are challenges with telecom. We have not had any reports of damage," Kryzanowski said.

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B.C. tsunami advisory

Storify: B.C. tsunami advisory (with tweets)