A 7.1-magnitude earthquake hit southern Alaska early Sunday, the US Geological Survey said.
The quake struck at 1:30 am (1030 GMT), some 260 kilometres south-west of Anchorage. It took place at a depth of 127 kilometres, according to USGS.
"Based on all available data ... there is no tsunami threat because the earthquake is located too deep inside the earth," the Pacific Tsunami Warning Center said.
The Anchorage Police Department posted on Twitter that there were no reports of major damage or injury following the quake.
The world's most quake-prone regions are located around the Pacific Ocean from Japan down to the Philippines and Indonesia and in the Americas, from Alaska to Chile - named the Pacific Ring of Fire, where about 90 per cent of the world's earthquakes occur.