ANCHORAGE, Alaska - A powerful earthquake shook up a large swath of Alaska, including the state's largest city.

The Alaska Earthquake Center says the quake had a 6.2 magnitude.

The quake occurred at 9:51 a.m. Thursday, 130 kilometres northwest of Anchorage, where it was strongly felt, and lingered for at least one minute.

There are no immediate reports of damage or injury.

No tsunami is expected.