5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather on a field outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

People gather for safety in a garden in

People gather for safety in a garden in Lower Manhattan after an earthquake in Virginia was felt in New York on August 23, 2011. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/Mladen ANTONOV (Photo credit should read MLADEN ANTONOV/AFP/Getty Images)

People gather in the streets near the c

People gather in the streets near the courthouse in Lower Manhattan in New York August 23, 2011 as buildings were evacuated. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/TIMOTHY A.CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Children in a crib are walked across Bor

Children in a crib are walked across Boradway in Lower Manhattan in New York August 23, 2011 as buildings were evacuated. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/TIMOTHY A.CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

A woman checks her phone as office worke

A woman checks her phone as office workers and others gather on Freedom Plaza after an earthquake struck Washington, DC August 23, 2011. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

Children in a crib are walked across Bor

Children in a crib are walked across Boradway in Lower Manhattan in New York August 23, 2011 as buildings were evacuated. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/TIMOTHY A.CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

People use pay telephones August 23, 201

People use pay telephones August 23, 2011 in Lower Manhattan, New York after an earthquake centered in Virginia was felt in the New York area causing the evacuation of buildings. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

Workers stand in Foley Square park Augus

Workers stand in Foley Square park August 23, 2011 in New York after an earthquake centered in Virginia was felt in the New York area causing the evacuation of buildings. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

Children in a crib are walked across Bor

Children in a crib are walked across Boradway in Lower Manhattan in New York August 23, 2011 as buildings were evacuated. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/TIMOTHY A.CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: Police keep watch outside an evacuated Manhattan courthouse following an earthquake that shook the city on August 23, 2011 in New York, United States. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Mario Tama/Getty Images)

A Parks Police helicopter inspects the W

A Parks Police helicopter inspects the Washington Monument shortly after an earthquake struck Washington, DC August 23, 2011. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks.AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

5.9 Earthquake Hits East Coast

NEW YORK, NY - AUGUST 23: Traffic sits stopped at the New Jersey bound entrance to the Holland tunnel after tremors from a 5.9 earthquake on August 23, 2011 in New York City. The epicenter was located in near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Michael Heiman/Getty Images)

121935671_8

NICHOLAS KAMM/AFP/Getty Images

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: Police officers keep watch outside an evacuated Manhattan courthouse after an earthquake rattled the city on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Mario Tama/Getty Images)

People evacuate the courthouse after an

People evacuate the courthouse after an earthquake was felt in New York on August 23, 2011 causing buildings to be evacuated. One of the strongest earthquakes to strike the US east coast in decades rattled offices in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York. The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground. AFP PHOTO/Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)

A man talks to his son his cell phone as

A man talks to his son his cell phone as evacuation cribs are pushed down Braodway in Lower Manhattan in New York August 23, 2011 as buildings were evacuated. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO TIMOTHY A.CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

People evacuate the courthouse after an

People evacuate the courthouse after an earthquake was felt in New York on August 23, 2011 causing buildings to be evacuated. One of the strongest earthquakes to strike the US east coast in decades rattled offices in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York. The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground. AFP PHOTO/Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)

Office workers stand on a street in New

Office workers stand on a street in New York after an earthquake centered in Virginia was felt in the New York area causing the evacuation of buildings. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks AFP PHOTO/MLADEN ANTONOV (Photo credit should read MLADEN ANTONOV/AFP/Getty Images)

A law enforcement officer is using a meg

A law enforcement officer is using a megaphone to communicate with the people gathered for safety in a garden in Lower Manhattan after an earthquake in Virginia was felt in New York on August 23, 2011. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks.AFP PHOTO/Mladen ANTONOV (Photo credit should read MLADEN ANTONOV/AFP/Getty Images)

A policewoman directs people to evacuate

A policewoman directs people to evacuate the courthouse after an earthquake was felt in New York on August 23, 2011 causing buildings to be evacuated. One of the strongest earthquakes to strike the US east coast in decades rattled offices in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York. The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground. AFP PHOTO/Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)

A man takes a photo of a Parks Police he

A man takes a photo of a Parks Police helicopter inspecting the Washington Monument shortly after an earthquake struck Washington, DC August 23, 2011.One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

A law enforcement officer is using a meg

A law enforcement officer is using a megaphon to communicate with the people gathered for safety in a garden in Lower Manhattan after an earthquake in Virginia was felt in New York on August 23, 2011. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks.AFP PHOTO/Mladen ANTONOV (Photo credit should read MLADEN ANTONOV/AFP/Getty Images)

A bride in her wedding dress runs from t

A bride in her wedding dress runs from the courthouse in Lower Manhattan in New York August 23, 2011. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York. The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground. The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks.
AFP PHOTO/TIMOTHY A.CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

A bride in her wedding dress runs from t

A bride in her wedding dress runs from the courthouse in Lower Manhattan in New York August 23, 2011. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks.
AFP PHOTO/TIMOTHY A.CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People stand outside of their buildings after being evacuated following an earthquake on August 23, 2011 in New York City. The 5.9 magnitude earthquake based in Virginia was felt throughout a large part of the east coast but didn't appear to cause any injuries. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings after being evacuated following an earthquake on August 23, 2011 in New York City. The 5.9 magnitude earthquake based in Virginia was felt throughout a large part of the east coast but didn't appear to cause any injuries. (Photo by Spencer Platt/Getty Images)

Office workers stand in Foley Square par

Office workers stand in Foley Square park August 23, 2011 in New York after an earthquake centered in Virginia was felt in the New York area causing the evacuation of buildings. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks.AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)

Workers stand in Foley Square park Augus

Workers stand in Foley Square park August 23, 2011 in New York after an earthquake centered in Virginia was felt in the New York area causing the evacuation of buildings. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)

5.9 Earthquake Hits East Coast

WASHINGTON, DC - AUGUST 23: Staff and employees from the Australian Embassy to the United States rally around a designated point outside their building after a 5.9 magnitude earthquake struck the East Coast August 23, 2011 in Washington, United States. The epicenter was located in near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Chip Somodevilla/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People stand outside of their buildings after being evacuated following an earthquake on August 23, 2011 in New York City. The 5.9 magnitude earthquake based in Virginia was felt throughout a large part of the east coast but didn't appear to cause any injuries. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Hits East Coast

WASHINGTON, DC - AUGUST 23: People try to communicate with their cell phones after being evacuated from their building after a 5.9 magnitude earthquake struck the east coast August 23, 2011 in Washington, United States. The epicenter was located in near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Chip Somodevilla/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

5.9 Earthquake Shakes East Coast

NEW YORK, NY - AUGUST 23: People gather on a field outside of their buildings in lower Manhattan after being evacuated following an earthquake on August 23, 2011 in New York City. The epicenter of the 5.9 earthquake was located near Louisa in central Virginia. Two nuclear power plants at the North Anna Power Station in the same county were reportedly taken offline. (Photo by Spencer Platt/Getty Images)

A woman checks her phone as office worke

A woman checks her phone as office workers and others gather on Freedom Plaza after an earthquake struck Washington, DC August 23, 2011. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

People stay behind a police warning band

People stay behind a police warning band as they gather for safety on a street in Lower Manhattan after an earthquake in Virginia was felt in New York on August 23, 2011. One of the strongest earthquakes to strike the US east coast in decades rattled offices Tuesday in downtown Washington and caused panicked evacuations from skyscrapers as far away as New York.The Pentagon, the US Capitol and Union Station in the nation's capital were all evacuated after the 5.9-magnitude quake, which was shallow with its epicenter only 0.6 miles (one kilometer) underground.The disruption to cell phone services in the hour after the quake added to the sense of panic in a country preparing to mark the 10th anniversary of the September 11, 2001 terror attacks.AFP PHOTO/Mladen ANTONOV (Photo credit should read MLADEN ANTONOV/AFP/Getty Images)