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.Â "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.
We felt it in Charlotte, NC. It was just a shaking sound that made all of our dishes tremble and then stopped.
we felt it in rockville MD and it knocked some pictures off the wall. it was a very intense 30 seconds. i am 10 and this was my first earthquake.
So much for CNN supporting the reporters who have their lives on the line in Libya. This earthquake on the east coast apparently did minimal damage, yet you would think it was worse than 9/11!!!!!!!! I am embarrassed for you on the east coast. Little itty bitty ground shaking. Geez!
I felt it here at the courthouse in Pburg Kentucky.. All the pictures shook on the wall.. And made us go sit outside on the steps...
WHEN PEOPLE LOOK TO THE NEWS TO FIND OUT INFORMATION OF SUCH MAGNITUDE WE SHOULDN'T HAVE TO GO THROUGH COMMERCIALS... PUN INTENDED!
Hello to you. I live in Montreal and around 2pm this earthquake was felt in different area of the province of Quebec, on our channel LCN people were stating that car were moving and so on. I do not know if this earthquake was on the surface or a deep one but it was felt on a very big distance. th you Lucie
I will bet you this earthquake was cause by fracking just like the ones that were happening a couple months ago around Little Rock. It is no wonder the American Natural Gas Association are running all the ads on TV telling us how safe drilling and fracking 3 miles down is. When they feel like they need to tell you how safe something is like High Fructose Corn Syrup you can bet your bottom dollar it is dangerous as hell and deadly.
Felt it in West Chester, PA.
didnt feel a thing in UK though , may be its still traveling under the sea, it will come like a tide
In Skokie, a north suburb of Chicago, on the top, 6th floor of our building, I definitely felt the shaking, and water in my cup was showing some waves....
OK, so I'm a liar. Shoot me?
Warren Jeffs said it was coming. ðŸ˜‰
It felt like a train was rolling through my building...ceiling and walls were shaking and a big rumbling sound, like a train...Richmond, VA
Felt in Boston ( downtown) Massachusetts.....
Definitely felt it in Downtown Richmond VA!! I thought the building was gonna go down.. a lot of people evacuated the building and I could not call out on my cell phone, glad no serious damage occurred!
That's just those Wisconsin women walking around