A dispatcher with the Anchorage Police Department said he didn't feel the quake, some 1,300 miles away, and there were no reports of any injuries or damages.
The Aleutian Islands are a chain of more than 300 islands that extend southwestward from Alaska into the northern Pacific Ocean.
A tsunami warning was canceled early Wednesday for Alaska's coasts after officials determined waves from the earthquake posed no widespread destructive threat.
The earth's most active seismic feature, the circum-Pacific seismic belt, brushes Alaska and the Aleutian Islands, where more earthquakes occur than in the other 49 States combined.
The Andreanof Island sustained a magnitude 8.8 earthquake in March 1957 that caused very severe damage on Adak and Unimak Islands. A damaging tsunami was generated, and a wall of water 40 feet high smashed the coastline of Scotch Cap on Unimak Island. Sand Bay, near Adak, reported 26-foot waves inundated its shores.
