A powerful 7.0 magnitude earthquake has struck Alaska, causing people to run from buildings and prompting a tsunami alert for coastal areas of the state.
The quake was centred about 7 miles (11km) north of Anchorage, the largest city in the state, according to the US Geological Survey (USGS).
A series of aftershocks were recorded following the initial shock, which had a depth of 40.9km, the USGS said.
Around 300,000 people live in Anchorage with 100,000 in the surrounding area.
There are currently no reports of casualties.
Police and fire teams are coordinating with Alaska State Troopers and National Guard, according to police chief Justin Doll.
Around 10,000 residents are currently without power and there have been some reports of building and bridge collapses.