The Virginia seismic zones in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its so ...

Virginia Virginia, officially the Commonwealth of Virginia, is a U.S. state, state in the Southeastern United States, Southeastern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States between the East Coast of the United States ...

include the Giles County seismic zone and the Central Virginia seismic zone.

Earthquakes An earthquakealso called a quake, tremor, or tembloris the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves. Earthquakes can range in intensity, from those so weak they c ...

in the state are irregular and rarely reach over 4.5 in

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

1897 event

The May 31, 1897, event was the strongest in Virginia's history. With a maximum Mercalli intensity of VIII (''Severe'') this shock destroyed many chimneys and created ground effects over a large area. It had a magnitude of 5.6 (a

seismic scale Seismic magnitude scales are used to describe the overall strength or "size" of an earthquake. These are distinguished from seismic intensity scales that categorize the intensity or severity of ground shaking (quaking) caused by an earthquake at ...

that is based on an isoseismal map or the event's felt area) and had severe effects in Narrows, where ground motion was observed and the flow of streams was disrupted.

2003 earthquakes

On December 9, 2003, at 3:59 pm EST (20:59 UTC), a magnitude 4.5 event occurred near

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about west of Richmond, and was felt strongly across the state. Tremors were reported in

North Carolina North Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, South Carolina to the south, Georgia (U.S. stat ...

Washington DC Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and Federal district of the United States, federal district of the United States. The city is on the Potomac River, across from ...

, and suburban

Maryland Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east ...

, eastern

West Virginia West Virginia is a mountainous U.S. state, state in the Southern United States, Southern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States.The United States Census Bureau, Census Bureau and the Association of American ...

, southern

Pennsylvania Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...

, and portions of the

Delmarva Peninsula The Delmarva Peninsula, or simply Delmarva, is a peninsula on the East Coast of the United States, occupied by the majority of the state of Delaware and parts of the Eastern Shore of Maryland and Eastern Shore of Virginia. The peninsula is l ...

. This event was located at 37.728° N, 78.087° W, at a depth of less than and may have occurred due to rupture along the Lakeside fault.

2011 earthquake

The U.S. Geological Survey (USGS) reported that a magnitude 5.8 earthquake hit Virginia on Tuesday, August 23, 2011, at 17:51:04 UTC (1:51 pm Eastern Daylight Time). The quake occurred at an approximate depth of 3.7 miles and was centered in Louisa County (location at 37.936°N, 77.933°W), 5 miles SSW of Mineral, Virginia and 37 miles NW of Richmond, Virginia's capital. Shaking was felt from

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, Georgia to

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash River, Wabash and Ohio River, Ohio rivers to its ...

to Detroit, Michigan to

Barrie Barrie is a city in Central Ontario, Canada, about north of Toronto. The city is within Simcoe County and located along the shores of Kempenfelt Bay. Although it is physically in the county, Barrie is politically independent. The city is part ...

, Ontario to

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. Many Washington, DC buildings saw precautionary evacuations. The earthquake caused an estimated $70 million in damage in Louisa County and forced Louisa County High School and Thomas Jefferson Elementary School to close for the year as well as rendered about a dozen homes unlivable. Other buildings were damaged as far away as Prince George's County,

. Three decorative pinnacles at

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fell. The

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was closed due to cracks in the top section.

References

External links

* {{Faults Geology of Virginia Geographic areas of seismological interest Seismic zones of the United States

1897 event

2003 earthquakes

2011 earthquake

See also

References

External links