Tsunami alerts have been issued for the entire west coast of North America after a huge 7.9-magnitude earthquake struck around 160 miles off the cost of Alaska.
The US Geological Survey said the quake struck at a depth of 10km at 9.31GMT on Tuesday morning.
Parts of Alaska and the west coast of Canada have been issued with a red tsunami warning, and citizens advised to get away from coastal areas.
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A tsunami watch is in place for California, Oregon and part of Washington state.
According to the US National Tsunami Warning Center (NTWC), any tsunami would strike the US west coast within the first six hours after the earthquake struck.
The NTWC has warned tsunami waves could “impact Hawaii” with the estimated earliest arrival set at 4.23am local time.
The National Weather Service said that a buoy just north-west of the epicentre recorded a displacement of 10 metres.
The Anchorage Office of Emergency Management said in a warning for people in Alaska and British Columbia, Canada: "If you are located in this coastal area, move inland to higher ground. Tsunami warnings mean that a tsunami with significant inundation is possible or is already occurring."
The Japan Meteorological Agency said that the quake posed no tsunami threat to Japan.
