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Quake strikes off Canadian coast

A magnitude-6.4 earthquake has struck off the coast of British Columbia.

The US Geological Survey said the quake struck at a depth of 14.3 miles about 173 miles west of Vancouver, and its epicentre was just off the west coast of Vancouver Island, south of Port Hardy.

The quake was initially reported to have a magnitude of 6.7 but was later downgraded by the USGS.

Stephen Halchuck, a seismologist with Natural Resources Canada, said the quake lasted for 20-30 seconds and rattled buildings across Vancouver Island and the south west portion of British Columbia. He said there has been no immediate reports of damage in the region.

According to the West Coast and Alaska Tsunami Warning Centre, no tsunami is expected.

"This event was not the type to generate a tsunami. Its size was not large enough and the mechanism of the earthquake would not have generated a significant tsunami," said Mr Halchuck.

However, the warning centre did advise that underwater landslides may cause "local tsunamis" at some coastal locations that experienced strong tremors.

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