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.
I felt it in Kettering, Ohio (near Dayton)
I am in Hickory, NC, which is in the foothills of NC mountains and felt it here. We are located next to an airport and jets have rattled the building, but was nothing like this. This was much stronger and shook the floors and walls.
Felt it in Mt. Pocono, Pa My radio desk swayed and my Dog freaked out!!!
"And as He sat upon the mount of Olives, the desciples came unto him privately, saying, Tell us, when shall these things be? and what shall be the sign of thy coming, and of the end of the world? And Jesus answered and said unto them, "Take heed that no man deceive you. For many shall come in my name, saying, I am Christ; and shall deceive many. And yes shall hear of wars and remours of wars; see that ye be not troubled; for all these things must come to pass, but the end is not yet. For nation shall rise againt nation, and kingdom against kingdom; and there shall be famines, and pestilences, and EARTHQUAKES in various places. All these are the beginning of sorrows."
TO ALL WHO WILL READ THIS: According to the Bible, no one knows when exactly the world will end, but, as God's children, I know that we all know within ourselves that the day is coming soon. Just look at all the movies out there that reference Bibilical terms relating to the End like "Armegeddon" "The Apocolypse" "The Omen" etc. Like you I don't know when Christ will return, but, like you, I'm making sure that my heart is ready for whenever he does come. Ask Christ to forgive you of your sins today, and accept him as your Savior." The Devil will put people in your path who will say, "Earthquakes, tsunamis, famine, etc. have always been around." That's true ofcourse, but never this many and all at once. This is God's way of warning us that the End is near much like Noah warned the people to get into the Ark before the flood. Did you know that he warned the people of the impending flood for 120 years while he built the ark which was no where near water? No one believed him, and they all drowned. Down get caught out of the ark this time. Christ is coming soon for those who love and obey him. Say this prayer and be ready for when he comes for you, "Dear Jesus, please forgive me of every sin that I have ever committed. I accept the gift of salvation you have given me by dieing on the cross as the sacrifice for my sins. Be my Lord and Savior, and lead, guide, and direct me in your righteous path for the rest of the days of my life on this earth and prepare for me a place in Heaven with you when my life is over. Amen"
We felt as sitting at our desk. Thought something was wrong or I was getting sick
End of Days yes, today no way!!
I was having a late lunch in Colchester, VT, and a woman eating there said, " Did you feel the earthquake?" I said when ? She said "Right now ! Appx. 15 people all agreed we could feel it. We are appx. 30 miles from the Canadian border
Felt in in New Haven! Our whole building moved!
I knew there was a reason to buy and store one of those 4th of July celebration fireworks packages. If Washington crumbled to the grown, I'd bust them out for a humble celebration of the ending of Totalitarian Humanist (evil) government. Remember WACO!!!
Landlines to the nuclear power plant are down -be reassurances not to worry -all is ok.
Why is this not reassuring?
Entire house was shaking here in Stafford, VA
I thought my wife moved – naaaaah it was the quake.. Silver spring MD
When it happened around 2:00, the whole building was shaking, people stopped in place, then one person said "it's an earthquake" We all just left the building and waited out side till we got an all-clear to go back into the building.
The nuclear plant is completely safe. It is made with very thick concrete. Thicker than that used at the guns of Navarone. It is really really thick and nothing will crack it. The earth could fall in half and that concrete would still be a single piece – like an asteroid floating in space it would still be in one piece. We have nothing to worry about go back to work on the 45th floor. The aftershocks will be very mild. Sell your gold and go to the brothel – make the most of it.
Felt it in Louisville KY!