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.
There was also a quake 5.0 outside of Montreal at almost the same time.... I felt it while on my laptop (here on business)
Felt it in Northport NY for about 2 minutes..whole house shook
We felt it in Mooresville, NC
We felt it in Maumee OHIO
felt by online friends in NY, near detroit, MI, and Southwestern PA
We felt it all the way in greenwich, CT!
Felt in Huntington, WV
Felt in Northern Kentucky and the Cincinnati, Ohio area
Felt it here in McGuire AFB, New Jersey. Freaked me out...
Felt in Columbus Ohio
We felt it in Dayton, Ohio
We felt it in Altoona, Pa
Felt it in Blacksburg, VA
Felt in Burlington, VT
We felt it here in Saratoga, NY 150 miles north of New York City
We felt it in Baltimore, MD
me to here in phila.
Buildings in Augusta Ga were evacuated due to the shaking as well.
Felt in Florence, SC
We felt it as a slow side to side motion for 20-30 seconds, very smooth slow rocking motion, no damage, in toronto,ontario canada and a small quick succession after shock of 5-8 seconds like shuttering feeling
our high rise building in downtown CIncinnati felt it....things were falling off our walls on the upper floor...desks moved
I felt it in mint Hill, NC!
We felt it pretty good here in Whithouse Station, NJ
felt it here in keyport nj
Felt it in Concord, Ontario, Canada (north of Toronto).
Felt it in Atlanta, Georgia.
Felt it in Athens, GA.
I work in Charlotte NC and felt it in my chair and also I have friends and family in Denver and Maiden NC that has called stating that they also felt it...
Also in Richmond Hill, Ontario, Canada
Small tremor in Fayetteville NC
We felt it in Warren Michigan.
I felt it here too in Moon Township (Pittsburgh) PA sometime @ 1:55PM.
felt it in Toronto Canada
I was working in my office in the home and I was yelling up to my son to see if he was shaking something and he ran down to tell me his bed was shaking, I thought it was the dryer in the basement.
here in Graham NC and hubby felt it in Mebane NC
Felt in Pittsburgh PA
We felt it in East Tennessee!!
felt in Michigan!
I did not feel it in California.
Maryland, felt like my house was coming apart
Felt it in Columbus, OH.
Felt it in Camp Lejeune, NC.
Freaky! We felt it at the US Steel Tower in Pittsburgh.
We felt tremors here in Charleston WV
We felt it up here in Toronto Canada. We don't get many earthquakes here, I can remember 3 in 32 years.
We felt it in Farmington, CT
Felt it here in Lancaster, Ohio.
Felt it in Augusta, Ga
WE FELT IT IN FLORENCE, SC
Felt in John's Creek GA.
We felt in in Burlington Nj...
I DEFINITELY FELT THE QUAKE! My husband is inspecting our home now!
Tremors could be felt in Pinnacle, NC. Any info as to what city in VA?
Mineral VA–about 60 miles outside of Richmond
we felt it in Sterling and Leesburg, VA
about 34 miles north of richmond
The epicenter was in Mineral Virginia
Felt in Henrico county, Richmond
Mineral, VA was the center.
Just NW of Richmond
Apparently the epicenter was in mineral va
Felt it in Richmond.
Louisa VA according to USGS
We felt it for well over a minute in Lynchburg, VA, which is about 45 miles south of Charlottesville and 4 hours drive south of Washington DC. It shook for a long time, but it was mild compared to EQ's I experienced in 1971 and 1994 in Southern California.
Felt here in Pompton Lakes NJ!
Epicenter is 6 km (4 miles) SSE (152Â°) from Louisa, VA
Evidently it was close to Charlottesville.
Earthquake was just outside Mineral, VA, which is a short distance northwest of Richmond.
Quake epicenter was east of Charlottesville, VA according to U.S. Geologic Survey. My bed shook like the Exorcist up here in Baltimore.
Mineral VA, Louisa County
yep we felt it here in Norfolk Va
They're saying the epicenter was in Fredericksburg, VA.
Pretty strong here in Richmond, VA.
We definitely felt it in Va Beach.
I'm in Fairfax, VA, and my whole house was shaking.
Not sure if we were at the epicenter but it was pretty strong in Richmond.
We felt it too here, on the eastern shore of Maryland, but it was just a gentle rocking. A friend in Stanton, VA said the doors were falling off the hinges at her school. A comment on here says it was felt in Ontario! That's insane.
4 miles southwest of Mineral, Virginia. This is right near and the nuclear power point at Lake Anna, Virginia.
details are here: http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/at00lqe6x3.php
i'm in richmond virginia, it shook our whole office building, it looks like the epicenter is just northwest around charlottesville, va where UVA is located
according to the earthquake center, near charlottesville
NW of Richmond, according to USGS coordinates are: 37.975Â°N, 77.969Â°W
I read somewhere it was Mineral, VA.
It cracked our foundation around our house........
I heard between Richmond and Charlottesville.
Looks like it was right down the road from Charlottesville, Va
Felt it here in Kitchener, Ontario, Canada
Ditto for Waterloo, Ontario...
Waterloo, ON felt it as well...
felt it in St.Catharines Ontario!!!!
It was felt here in Toronto, Ontario!!
And London ON too
We felt it here too in central North Carolina.
Yes!! Felt it in Winston Salem, North Carolina
People from Wilmington, DE felt the quake thats so odd...
Felt in Morgantown WV...
We felt it here in Parkersburg WV, also a small aftershock.
Felt in Beckley, WV as well...
It was felt in Greenville, NC too!
Felt it in Teaneck, NJ, as did folks in central Jersey.
In Mt. Laurel NJ too
partner's building in Midtown was evacuated because of the shaking.
We felt it in Indiana.
Quit lying, no you didn't.
mary are you from aolumbus indiana
mary are you from indiana
Strong here in Long Island, NY!
Shake was felt in West Virginia in Charleston, Parkersburg & Ravenswood.
Felt it in Troy, Ohio
We are in New Bedford, MA and felt it here – shocking and glad we didn't get the full 5.8 – hoping news reports are no one injured.