The 7.8 magnitude earthquake hit about 75 miles south of Chignik in Alaska. Officials have now issued a tsunami warning for South Alaska and the Alaska Peninsula, from Kennedy Entrance to Unimak Pass.
The US Tsunami Warning System said tsunami activity was predicted to hit within the next hour at points along the Alaskan coast.
It said Sand Point could be hit at 11.15pm local time (8.15am BST), Kodiak at 12.05am (9.05am BST) and Cold Bay at 12.15am (9.15am BST).
Witnesses recorded their experiences on earthquake-tracking website EMSC-CSEM.
One said: “Bed and curtains were going. Felt like a very long quake! Felt at Homer, Ak at the end of the Spit at Lands End.”
Another said: “Felt very dizzy.”
Residents in the area were urged to get to “higher ground”.
The alert read: “If you are in a tsunami warning area, evacuate inland or to higher ground above and beyond designated tsunami hazard zones or move to an upper floor of a multi-story building depending on your situation.
“Move out of the water, off the beach, and away from harbors, marinas, breakwaters, bays and inlets.
“Be alert to and follow instructions from your local emergency officials because they may have more detailed of specific information for your location.”
MORE TO FOLLOW
This is a developing story.. refresh for updates