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Nothing Human Is Alien
23rd August 2011, 20:13
WASHINGTON (AP) — A 5.9 magnitude earthquake centered in Virginia forced evacuations of all the monuments in Washington and rattled nerves from the southern state of Georgia to Martha's Vineyard, the Massachusetts island in the northeast where President Barack Obama is vacationing. No injuries were immediately reported.

The U.S. Geological Survey said the earthquake was half a mile (800 meters) deep and centered about 40 miles (64 kilometers) northwest of Richmond, the state capital of Virginia. Shaking was felt at the White House and all over the East Coast, as far south as Chapel Hill, North Carolina, Parts of the Pentagon, White House and Capitol were evacuated.

Two nuclear reactors at the North Anna Power Station in the same county as the epicenter were automatically taken off line by safety systems around the time of the earthquake, said Roger Hannah, a spokesman for the U.S. Nuclear Regulatory Commission.

The power plant is being from four emergency diesel generators, which are supplying power for critical safety equipment. Hannah said the agency was not immediately aware of any damage at nuclear power plants in the Southeast.

Obama and many of the nation's leaders were out of town on August vacation when the quake struck at 1:51 p.m. EDT (1751 GMT). The shaking was felt on the Martha's Vineyard golf course as Obama was just starting a round.

At the Pentagon in northern Virginia, a low rumbling built and built to the point that the building was shaking. People ran into the corridors of the government's biggest building and as the shaking continued there were shouts of "Evacuate! Evacuate!"

The U.S. Park Service evacuated and closed all National Mall monuments and memorials. At Reagan National Airport outside Washington, ceiling tiles fell during a few seconds of shaking. Authorities announced it was an earthquake and all flights were put on hold.

In New York, the 26-story federal courthouse in lower Manhattan began swaying and hundreds of people were seen leaving the building. Court officers were not letting people back in.

The quake came a day after an earthquake in Colorado toppled groceries off shelves and caused minor damage to homes in the southern part of the state and in northern New Mexico. No injuries were reported as aftershocks continued Tuesday.

In Charleston, West Virginia, hundreds of workers left the state Capitol building and employees at other downtown office buildings were asked to leave temporarily.

"The whole building shook," said Jennifer Bundy, a spokeswoman for the state Supreme Court. "You could feel two different shakes. Everybody just kind of came out on their own."

In Ohio, where office buildings swayed in Columbus and Cincinnati and the press box at the Cleveland Indians' Progressive Field shook. At least one building near the Statehouse was evacuated in downtown Columbus.

In downtown Baltimore, the quake sent office workers into the streets, where lamp posts swayed slightly as they called family and friends to check in.

Social media site Twitter lit up with reports of the earthquake from people using the site up and down the U.S. eastern seaboard.

"People pouring out of buildings and onto the sidewalks..in downtown DC...," tweeted Republican strategist Kevin Madden.

"did you feel earthquake in ny? It started in richmond va!" tweeted Arianna Huffington, president and editor-in-chief of the Huffington Post Media Group.

John Gurlach, air traffic controller at the Morgantown, West Virginia Municipal Airport was in a 40-foot-tall (12 meters) tower when the earth trembled.

"There were two of us looking at each other saying, 'What's that?'" he said, even as a commuter plane was landing. "It was noticeably shaking. It felt like a B-52 unloading."

Immediately, the phone rang from the nearest airport in Clarksburg, West Virginia, and a computer began spitting out green strips of paper — alerts from other airports in New York and Washington issuing ground stops "due to earthquake."

Luc
23rd August 2011, 20:31
God Damn, I must of felt that earlier today:ohmy: but luckily I'm far from the center so nothing happened here.

edit: of nv the one I felt was an earthquake on ON/Quebec border

MattShizzle
23rd August 2011, 21:07
I felt it here. Didn't know what it was until I saw posts on facebook.

Welshy
24th August 2011, 00:26
I didn't feel it at all. Neither did any of my family.

Nothing Human Is Alien
24th August 2011, 00:30
The quake that hit the East Coast on Tuesday afternoon was notable, but not unprecedented, for the eastern half of the country, geoscientists say.

Additionally, the shaking was felt over such a large area — as far south as Atlanta and as far north as Ontario, according to eyewitness reports — largely because the eastern part of the North American continent is different than the West Coast, where quakes are more common. [Album: The Great San Francisco Earthquake]

"The crust is different in the east than in the west," United States Geological Survey (USGS) earthquake geologist David Schwartz told LiveScience. "It's older and colder and denser, and as a result, seismic waves travel much farther in the east than in the west."

Additionally, said Andy Frassetto of the Incorporated Research Institutions for Seismology, the sediments along the east coast can make quakes feel stronger.

"The sediments of the coastal plain along the eastern seaboard can trap waves as they propagate and produce a minor amplification of the shaking," Frassetto told LiveScience.

A much more extreme version of this effect occurred during the earthquake that hit Christchurch, New Zealand, this year, Frassetto said.

Faults that rupture east of the Rockies usually create quakes felt over more than 10 times the area than those west of the mountains, according to the USGS. A magnitude-5.5 quake in the Eastern U.S. can usually be felt as far as 300 miles (500 km) away.

Latest Shaking

According to the USGS, the 5.8-magnitude quake struck at 1:51 p.m. Eastern Time. The epicenter was 5 miles (8 kilometers) from Mineral, Va., and 84 miles (135 kilometers) away from Washington, D.C. Despite the distance, the Pentagon, the Capitol and other buildings were evacuated. [Read: Large Earthquake Could Strike New York City]

The quake was only about 3.7 miles (6 km) deep, according to the USGS. That's typical for the eastern U.S., Frassetto said. In the east, he said, quakes usually originate in the upper part of the crust.

In contrast, subduction zones such as the Pacific Ring of Fire, where one plate is being pushed under another, produce very deep quakes — sometimes 435 miles (700 km) down, Frassetto said. These super-deep quakes may not even be felt on the surface.

Quakes in the east

Since Virginia lies in the middle of a continental plate, the state doesn't generally experience large-magnitude earthquakes like those that rattle Los Angeles, Alaska, Haiti, Japan and Chile (or any other areas on the edge of a tectonic plate), according to the USGS.

Even so, since 1977, there have been about 200 earthquakes in Virginia. The last "big one" in Virginia occurred on May 31, 1897, in Pearisburg; it was a 5.8-magnitude temblor that, in addition to cracking walls and toppling chimneys, reportedly caused a judge in the courthouse there to adjourn a trial, jumping over a railing and fleeing outside, according to the USGS.

Virginia is classified as a "moderate" seismic risk, with a 10-20 percent chance of experiencing a 4.75-magnitude earthquake (in quakes above 4.5, buildings begin to fall), the USGS said. Alaska and California take the first and second spots for the most earthquakes in the U.S., respectively, though California experiences more damaging earthquakes due to its greater population and extensive infrastructure.

There is a history of damaging quakes in the eastern United States, however. A destructive quake hit Charleston, S.C., in 1886, damaging thousands of buildings. Its magnitude was probably near 7.0 on the Richter scale. And in 1755, a quake with around a 6.0 magnitude struck off the coast of Massachusetts.

KurtFF8
24th August 2011, 19:35
I felt it here. Didn't know what it was until I saw posts on facebook.

Exactly the same thing for me.

I thought it was a bunch of people on my roof jumping around or something and got annoyed.

Although I was a bit confused about why the entire building was moving.

Stand Your Ground
24th August 2011, 19:44
We got a little shake but nothing crazy, I didn't even notice it but other people did.