Quake strikes off western Canada, tsunami warning issued

GOLDEN, Colorado (AP) - A magnitude-7.7 earthquake struck off the coast of western Canada at 0314 GMT on Sunday. There are no immediate reports of damage but a tsunami warning was issued.

The US Geological Survey (USGS) in Colorado says the quake hit the Queen Charlotte Islands and was centred 155 kilometres south of Masset, British Columbia.

The National Weather Service has issued a warning for coastal areas of British Columbia, southern Alaska, Northern California, Oregon and Washington state. It says the warning area includes Craig and Sitka, Alaska

The USGS says the 7.7-magnitude quake shook the area and was then followed by a 5.8-magnitude aftershock several minutes later.