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 it in queens new york. my closet door was open and i noticed my clothes swaying and a book case shaking. i thought it was a truck. I didn't hear one or see one out the window,
Felt it in upstate NY
I felt it in Brockport, Pennsyvania
we felt it in Durham NC, the whole office was shaking
Felt it here in Boston, MA.
Felt strongly in upstate New York.
Felt a 30 second 'wave' in Lanesboro, MASS.
Felt in Akron, Ohio too
we felt it in Pittsburgh, PA
Fellt it here in Albany NY!
Greensboro NC – tremors here!!!!
We felt it in Pittsburgh PA!
Felt in Hamilton, Ontario Canada.
It was felt out here in Hauppauge on Long Island!!!!
We felt this in Baltimore
Felt a tremor (about 10 seconds) here in Boston, MA
We felt here In NYC. I lost complete balance.....Very strange feeling....
Felt in Boston.
Felt it just north of Toronto, Canada as well...
Felt it here in Toronto
felt it in warminster, pa
I just felt the earthquake, the room and house, tv and furnshings just shook in Poughkeepsie, New York, Lagrange area. Hope everyone is okay!
Shaking in Rochester, NY
Felt in Detroit MI
Felt it on the upper East Side of NYC
we felt it Dearborn Michigan
Felt it in Framingham MA
We felt it in Brattleboro, VT! The whole building was swaying!
felt it in delmar, maryland
Felt it here in Clifton, NJ.
Felt it strong in Stafford County, va
Felt it in Winslow New Jersey
felt it in central jersey
We felt it in Toronto
felt it here in fredericksburg virginia
Felt it in Montreal. But I'm in a high rise. A friend of mine who was at street level didn't feel anything.
Felt in Elizabethton, TN as well.
Felt it in West Suffield CT, just south of Springfield MA. My whole house rocked back and forth. CRAZY
Felt in Southwest Virginia, Falls Mills.
Where Upstate?
We felt it up here in Boston.
It was felt here in Toledo, OHIO
Felt it in Fayetteville, NC at the MJ Soffe office building
Felt it in holtsville ny
Felt it in Rochester, NY
We felt it shake for about 2-3 seconds in Pittsburgh, PA
I felt it in PIttsburgh. House shook and computer monitor rocked. Wii CD became off balance and made noises.
shook my whole house
Long Island NY checking in. Felt here also
Felt the quake in Mechanicsburg PA
Felt in Medford, MA
felt it here in pa
Felt it in Concord, NC. 10th floor in the hotel (Embassy Suites right near Charlotte Motor Speedway. )
Some nice shaking, making us wonder what was going on. Looked out the windows and the doors to see what it could be. Now we know.
Mitch
We felt it here in America's Home town (Plymouth) Pretty scary even though I could only feel the house shaking and glasses clanging. I knew it was an earthquake because I hadn't even started drinking yet!!!
Felt here in Columbus, Ohio. Was looking at computer and thought I was having an attack of vertigo because the room was going back and forth. Freaky,
We felt it in Dayton too. Our whole office shook. We thought we were having a mass attack of vertigo.
that is the EXACT same thing i thought, like something was physically wrong with me..
What?? Columbus, Ohio? i'm sitting here at my computer playing WoW and I didn't feel a thing!! o.O btw today's my day off so yes i have time to play, for all those Wow-haters 😛
Same here, in Columbus, OH also. Felt it shaking and felt really weird
Was felt here in Pittsburgh, PA also
same here in Brooklyn, NY
Me too (in Cbus)! It felt like someone was shaking my couch!
Felt everything shake in my house here a few miles from Albany, NY.
shaking the politicians like rats in hole. Karma is coming to you.
Now if only hurricane Irene will finish the job!
Ron Brooks, you are pathetic.
Felt in a high rise on Boston, MA!!
felt it on the fifth floor of my office in Cambridge, MA
Felt it in New York City too!! My whole sofa started shaking!!
Is this a sign of a deep thought actually occurring in the White House?
It was felt in Columbia, SC!!!!
felt it in tenafly, nj. could feel the building shaking.
We felt it in Chesapeake VA and my friend felt it in Raleigh NC.
Dear East Coast -
Let us know if we can be of assistance. We've done this once or twice.
Sincerely,
San Francisco
Felt the earth move and the house shake in Cherry Hill, NJ!
Felt it in Brampton, Ontario, Canada, minor tremor, thought i was feeling dizzy for not having lunch. lol.. but other ppl at office felt it.
felt it in Hampton, VA