The Latest on Alaska earthquake (all times local):
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8:20 a.m.
Strong aftershocks from Alaska's magnitude 7.0 earthquake continued Saturday around Anchorage, jolting people awake and pummeling already frayed nerves.
The U.S. Geological Survey says there have been 545 aftershocks, including a 5.7 magnitude shaker that followed Friday's big quake almost immediately.
Geophysicist Paul Caruso says 11 aftershocks have had magnitudes of 4.5 or greater. He says there should be fewer and weaker aftershocks in the coming days, but officials can't say for sure when they will stop.
Friday's quake was centered about 7 miles (12 kilometers) north of Anchorage. There have been no reports of deaths or serious injuries.
President Donald Trump late Friday declared an emergency for the earthquake, which allowed the Federal Emergency Management Agency to coordinate disaster relief efforts.
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12 a.m.
Two strong earthquakes measuring 7.0 and 5.7 ripped apart highways, cracked buildings and rattled people's nerves around Anchorage.
The quakes on Friday broke store windows, opened cracks in a two-story building downtown, disrupted electrical service and disabled traffic lights, snarling traffic.
There were no reports of any deaths or serious injuries.
The U.S. Geological Survey says the first and more powerful quake was centered about 7 miles (12 kilometers) north of Anchorage, Alaska's largest city, with a population of about 300,000.
People ran from their offices and into the streets or took cover under desks as the ground shook for about 30 seconds.
Anchorage Police Chief Justin Doll says parts of Glenn Highway, a scenic route that runs northeast of the city, had "completely disappeared."