A magnitude 6.0 earthquake has struck to the south of the Alaska peninsula but the National Weather Service says no tsunami warning has been issued.
The quake was centred about 100km south-southwest of Sand Point, Alaska, at a depth of 17km and struck early on Thursday, according to the US Geological Survey.
"No tsunami warning, advisory, watch or threat," said officials from the National Weather Service, a unit of the National Oceanic and Atmospheric Administration.
The quake was far milder than a magnitude 7.9 earthquake that struck the Gulf of Alaska in January, triggering tsunami alerts for the US West Coast and Canada as well as spurring evacuations in coastal Alaska and warnings as far south as California.
The largest earthquake ever recorded in the United States was also in Alaska, a magnitude 9.2 tremor in March 1964, causing tidal waves of more than 30m high that killed 131 people.
