A powerful earthquake of magnitude 8.2 struck off the southern coast of Alaska early Tuesday, the US Geological Survey said.
Tsunami warnings were issued for Alaska and the west coast of Canada, the National Tsunami Warning Center said.
The quake struck at 0931 GMT in the Gulf of Alaska, 280 kilometers southeast of the town of Kodiak, the USGS said. The epicenter was 10 kms under the seabed.
Less ominous tsunami watches were issued for the US west coast -- the entire coasts of California and Oregon and part of Washington state.