An earthquake with an initial 7.1 magnitude has struck the Aleutian Islands in the far northwestern U.S. state of Alaska, prompting a tsunami warning that was later canceled for the remote region.

The U.S. Geological Survey says the earthquake occurred in the Pacific Ocean early Friday at a depth of about 35 kilometers. The epicenter was some 1,600 kilometers from the state's largest city, Anchorage.

The tsunami warning had been briefly in effect for coastal areas of the Aleutian Islands, from Unimak Pass to Amchitka Pass.

The Pacific Tsunami Warning Center said it did not see a threat of a widespread destructive tsunami from the quake.