Tsunami warnings canceled along US, Canada coast

WASHINGTON, The US Tsunami Warning Center on Tuesday lifted warnings and watches along the US and Canadian Pacific coast, deeming there was no longer a threat following a powerful earthquake off Alaska's coast. 
The 7.9-magnitude quake struck off the coast of Alaska early Tuesday, briefly putting populations along the Canadian and US west coast on high alert in case of dangerous waves, but the US monitor later said "additional information and analysis have better defined the threat." 
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