A magnitude-7.7 earthquake has struck off the coast of western Canada and a tsunami warning has been issued. There are no immediate reports of damage. The US Geological Survey in Colorado says the quake hit the Queen Charlotte Islands at 11.14pm on Sunday local time (0314 GMT) and was centered 96 miles (155 kilometers) 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.

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