An earthquake with a preliminary magnitude of 5.9 struck Tuesday afternoon near Washington, D.C., the U.S. Geological Survey said.
The epicenter was in Mineral, Virginia. The quake was four miles deep, according to the USGS. Did you feel it? Send CNN an iReport.
To get complete coverage and all the latest updates, click on CNN's main story here. View a CNN Open Story about the quake. CNN Open Story combines iReports with reports from CNNers across the globe on a map and timeline.
Update 3:36 p.m. ET: Terminal A at Washington Reagan National Airport has been evacuated because of an odor of gas, airport spokeswoman Courtney Mickalonis said. Initial sweeps of the building showed no major damage from the earthquake.
Light structural damage has been reported in Culpepper and Orange counties in Virginia, said Laura Southard of the state Emergency Operations Center. She said there have been no reports of injuries in Virginia.
Update 3:28 p.m. ET: The White House and adjacent buildings evacuated as a precaution following the earthquake have been given the all-clear, the U.S. Secret Service said. The FBI and Justice Department have also reopened evacuated buildings.
Update 3:25 p.m. ET: East Coast residents should be prepared to feel aftershocks from Tuesday's earthquake, a U.S. Geological Survey official said.
Update 3:22 p.m. ET: The North Anna nuclear power plant, located 20 miles from the epicenter, is shut down and in a safe condition, a company official and the Louisa County public information office report. There has been no release of nuclear material, Louisa County spokeswoman Amanda Reidelbach said.
Update 3:04 p.m. ET: All national monuments and parks in Washington are "stable but closed" following Tuesday's earthquake, a United States Park Police spokesman Sgt. David Schlosser said. A couple of minor injuries and some minor structural damage have been reported in Washington, following Tuesday's earthquake, according to Schlosser.
Part of the central tower of the National Cathedral, the highest point in Washington, was damaged, according to spokesman Richard Weinberg. "It looks like three of the pinnacles have broken off the central tower," Weinberg told CNN.
Update 3:02 p.m. ET: Amtrak is reporting service disruptions between Washington and Baltimore because of the earthquake, the company reported on Twitter.
Aftershocks are a concern, U.S. Geological Survey seismologist Lucy Jones told CNN. "People should be expecting (them), especially over the next hour or two," she said.
The quake was felt in Philadelphia, Pennsylvania; New York City and on Martha's Vineyard, Massachusetts, where President Barack Obama is vacationing. It's unknown if the president felt the quake.
The Pentagon has been evacuated, CNN's Barbara Starr reports. "When the building began shaking rather violently, hundreds of people began streaming out," she said, because many people thought that the building was under attack. Starr was standing in the Pentagon's press office when the roof started to shake.
Cell phone service has been disrupted in New York City, CNN learned within minutes of the quake.
Updated 2:47 p.m. ET: A "considerable amount" of water from a water pipe has flooded two corridors of the Pentagon, according to an announcement in the building. People who work in those areas are being asked to stay in their offices while workers try to repair the damage.
The National Cathedral in Washington is damaged, CNN has confirmed.
And Dominion Generation, which operates the North Anna nuclear power station in central Virginia a few miles from the epicenter of the earthquake, is trying to reach operational staff at the plant, according to a company spokesman. Landlines to the plant appear to be down.
Shortly after the quake struck, traders in the New York Stock Exchange also felt the quake and shouted to each other, "Keep trading!" CNN's business correspondent Alison Kosik reported from the floor at 2:20 p.m. E.T.
Twitter traffic suggests the quake was felt all over the East Coast.
In Philadelphia, HunterPence3 tweeted, "Wow Earthquake just shook the entire locker room!"
In Cleveland, "tribeinsider" wrote "I'm no expert but i think we just had an earthquake here."
And even in Toronto, Canada, tweets said that the shaking could be felt for minutes.
Pete Krech, who works at a business in Fredericksburg, Virginia, likened the sensation to being on a jolting amusement ride. "I was receiving a supply truck," said Krech, store manager at Mattress Warehouse of Fredericksburg, south of Washington. "I felt a vibration under my feet."
Brendan Wein, a sales representative at Hoffman Nursery in Roxboro, North Carolina, said he thought there was a helicopter flying above his work building. "I was literally shaking in my chair," he said.
CNN iReporter Jeff Yapalater said he was in his backyard in New York's Long Island when the earthquake hit. "Suddenly I felt this light swaying of the Earth. I'd never felt that before, so I thought maybe I was experiencing vertigo for a moment, and it lasted maybe 30 seconds ... We're feeling this really far away!" he wrote.
Felt after shocks here in the small town of Martin, Kentucky.
It's getting harder and harder to tell people that I'm american.....
bcoz ur a moron?
What do you mean?
This morning Colorado, this afternoon Virginia ... next one is in the middle. New Madrid is going, and when it is ... it will be big. So be prepared !
my whole building swayed back and forth in down town pittsburgh
Its coming the big one..Get ready everyone. Run back to Church now , repect of your sins of the flesh thoughts mind and deed. It will be too late wihen hte Lord Jesus is comes back. This next year lots of earthy pangs and supernatural stuff going to happen. Going to Medjugorje in Bosnia Herzovigina , Our Blessed Mother Mary has been appearing there every day for 30 years. She is wanting her children to come back to her Motherly heart and her son Jesus .....stuff is going to happpen soon........................go back to Church..any church start worshipping God not money, the Kardashians , your skin, job, power, wealth etc...............Put God first...worship him..its coming.
Wouldn't doubt it. You take care!!! God bless you and your loved ones.
Oy vey. Please, lady.
I was at work in Connelly Springs NC just east of Hickory when I heard a rattling sound. I went out into the tech area and observed a heavy metal door shaking and the conduit in the ceiling rattling. Kind of scary!!!
We live in a rambler ( one upper story brick house with basement) so I didn't feel the ground swaying- it was more like vigorous and jarring drilling and I could hear rumbling-I thought there was an explosion or big, big, construction/drilling at first. Thank God it was not that strong. It was very quick (maybe 20 sec). Looks like there are no major casualties and damages, so thank God and let's continue to pray for God's mercy and protection.
I'm praying for everyone to see the truth. This is just a sign for us to wake up. Some people are just walkin around with their eyes closed. You wait too long and you're goin to be jarred awake. Wait too long and you're going to be so sorry. I love my brothers and sisters through God. I'm praying for all your protection and when the time comes that you will be taken in the beauty and glory of Jesus Christ.
Felt it in Austin, Texas! Oh nevermind, that was due to what I had at lunch.
It was caused by Baba Booey grinding his giant horse teeth
Ha! That was a stabbing good one, Artie!
For the people in California saying this earthquake is nothing, you are ignorant. Unless you've lived through an event like 9/11 in NY and DC you should NOT judge. Many of us thought that it was a terrorist attack and phone lines were down so it was scary.
Ya, totally. This just doesn't happen. Everyone better be ready cuz I don't think this is the end of odd things. The oldest side of the world doesn't like to move around. I really want someone to see what is going on with Yellowstone. I wanna know if this will affect its volcano.
We felt it in Sourthern NH! Scary when your at work and kids are else where!!!!
I felt your mom.
Definitly felt it here in Charlottesville. Stillfeeling aftershocks. scary.
Repent and be Baptized for the end is near!!! Just saying…..
You got that right!!!
Give it a rest, already.
felt it here in FAIRLESS HILL PA
Our Office in Dubuque, Iowa shook for a good 30 seconds. Everyone stood up together like they were getting light-headed because the buidling was shaking