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Alaska surveys damage after two earthquakes measuring 7.0 and 5.7 hit Anchorage

Click to play video 'Alaska governor, Anchorage mayor speak about damage to cities after earthquake' Alaska governor, Anchorage mayor speak about damage to cities after earthquake
WATCH: Alaska Gov. Bill Walker and Anchorage Mayor Ethan Berkowitz spoke about the magnitude 7.0 earthquake on Friday, saying the way they build structures and their preparedness, due to living in an earthquake zone, is what helped prevent deaths and mitigate the amount of damaged buildings – Nov 30, 2018

Chris Riekena was driving his 7-year-old son to school when his car started acting up. As he pulled over, he realized the problem wasn’t his car — it was a huge earthquake.

Riekena turned around to calm his son in the back seat and when he looked forward again, the road ahead of him was sinking into the earth. He pulled his son out of the car as light poles along the road swayed in the air.

By the time the shaking stopped Friday, the car just in front of his on the freeway was marooned on an island of asphalt with a huge chasm on both sides.

WATCH: Alaskan earthquake causes widespread damage

Click to play video 'Alaskan earthquake causes widespread damage' Alaskan earthquake causes widespread damage
Alaskan earthquake causes widespread damage – Nov 30, 2018

“It was probably a good 30 to 40 seconds of slow-motion disaster,” said Riekena, an engineer with the Alaska Department of Transportation who later returned to the site for his job.

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“Thankfully I pulled over when I did,” he said. “I’ve walked around the site enough over the last few hours that I’ve replayed that a few times.”

Back-to-back earthquakes measuring 7.0 and 5.7 shattered highways and rocked buildings Friday in Anchorage and the surrounding area, sending people running into the streets and briefly triggering a tsunami warning for islands and coastal areas south of the city.

WATCH: A look at the Alaska earthquake which left buildings damaged and people shaken

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A look at the Alaska earthquake which left buildings damaged and people shaken – Nov 30, 2018

No tsunami arrived and there were no reports of deaths or serious injuries.

One of the top seismologists in the U.S. says residents near Anchorage should expect aftershocks following the 7.0 magnitude quake that struck near that city early Friday. (Nov. 30)

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The U.S. Geological Survey said 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 or took cover under desks. The 5.7 aftershock arrived within minutes, followed by a series of smaller quakes.

READ MORE: Alaska earthquake: ‘Major’ damage left by 7.0 magnitude jolt

“We just hung onto each other. You couldn’t even stand,” said Sheila Bailey, who was working at a high school cafeteria in Palmer, about 45 miles from Anchorage, when the quake struck. “It sounded and felt like the school was breaking apart.”

Anchorage Police Chief Justin Doll said he had been told that parts of Glenn Highway, a scenic route that runs northeast out of the city past farms, mountains and glaciers, had “completely disappeared.”

The quake broke store windows, knocked items off shelves, opened cracks in a two-story building downtown, disrupted electrical service and disabled traffic lights, snarling traffic.

Flights at the airport were suspended for hours after the quake knocked out telephones and forced the evacuation of the control tower. And the 800-mile Alaska oil pipeline was shut down for hours while crews were sent to inspect it for damage.

An employee walks past a damaged aisle at Anchorage True Value hardware store after an earthquake, Friday morning, Nov. 30, 2018, in Anchorage, Alaska.
An employee walks past a damaged aisle at Anchorage True Value hardware store after an earthquake, Friday morning, Nov. 30, 2018, in Anchorage, Alaska. (AP Photo/Dan Joling)

Anchorage’s school system canceled classes and asked parents to pick up their children while it examined buildings for gas leaks or other damage.

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Jonathan Lettow was waiting with his 5-year-old daughter and other children for a school bus near their home in Wasilla, about 40 miles north of Anchorage, when the quake struck. The children got on the ground in a circle while Lettow tried to keep them calm and watched for falling trees.

“It’s one of those things where in your head, you think, ‘OK, it’s going to stop,’ and you say that to yourself so many times in your head that finally you think, ‘OK, maybe this isn’t going to stop,’” he said.

WATCH: Family reacts as Alaska quake hits, people evacuate airport

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Family reacts as Alaska quake hits, people evacuate airport – Nov 30, 2018

Soon after the shaking ended, the school bus pulled up and the children boarded, but the driver stopped at a bridge and refused to go across because of deep cracks in the road, he said.

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Gov. Bill Walker issued a disaster declaration. He was in an elevator in a high-rise Anchorage office building and said it was a “rough ride” coming down. He described the quake as a 7.2, though it was unclear why his figure differed from that of the USGS.

Walker says it will take more than a week or two to repair roads damaged by the earthquake.

WATCH: 7.0-magnitude earthquake that hits near Anchorage, Alaska

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7.0-magnitude earthquake that hits near Anchorage, Alaska – Nov 30, 2018

“This is much more significant than that,” he told reporters at a news conference.

In Kenai, southwest of Anchorage, Brandon Slaton was soaking in his bathtub when the earthquake struck. The temblor created a powerful back-and-forth sloshing that threw him out of the tub, he said.

His 120-pound mastiff panicked and tried to run down the stairs, but the house was swaying so much that the dog was thrown into a wall and tumbled down the stairs, Slaton said.

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Slaton ran into his son’s room after the shaking stopped. The boy’s fish was on the floor, gasping, its tank shattered. Slaton put the fish in a bowl.

WATCH: Alaska earthquake rattles cars, spooks animals

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Alaska earthquake rattles cars, spooks animals – Nov 30, 2018

“It was anarchy,” he said. “There’s no pictures left on the walls, there’s no power, there’s no fish tank left. Everything that’s not tied down is broke.”

Alaska was the site of the most powerful earthquake ever recorded in the U.S. The 9.2-magnitude quake on March 27, 1964, was centered about 75 miles (120 kilometers) east of Anchorage. It and the tsunami it triggered claimed about 130 lives.

The state averages 40,000 earthquakes a year, with more large quakes than the 49 other states combined. Southern Alaska has a high risk of earthquakes because the Earth’s plates slide past each other under the region.

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WATCH: Hundreds of aftershocks rock Alaska following big quake

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Hundreds of aftershocks rock Alaska following big quake – Dec 1, 2018

Alaska has been hit by a number of powerful quakes over 7.0 in recent decades, including a 7.9 last January southeast of Kodiak Island. But it is rare for a quake this big to strike so close to such a heavily populated area.

David Harper was getting coffee at a store when the low rumble began and intensified into something that sounded “like the building was just going to fall apart.” He ran for the exit with other patrons.

“People who were outside were actively hugging each other,” he said. “You could tell that it was a bad one.”

WATCH: Officials in Anchorage, Alaska provide update on the aftermath of the 7.0 magnitude earthquake

Click to play video 'Officials in Anchorage, Alaska provide update on the aftermath of the 7.0 magnitude earthquake' Officials in Anchorage, Alaska provide update on the aftermath of the 7.0 magnitude earthquake
Officials in Anchorage, Alaska provide update on the aftermath of the 7.0 magnitude earthquake – Dec 1, 2018