The 2006 Gulf of Mexico earthquake occurred in the eastern

Gulf of Mexico The Gulf of Mexico ( es, Golfo de México) is an oceanic basin, ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of ...

on September 10 at . The

intraplate earthquake The term intraplate earthquake refers to a variety of earthquake that occurs ''within the interior'' of a tectonic plate; this stands in contrast to an interplate earthquake, which occurs ''at the boundary'' of a tectonic plate. Intraplate earth ...

measured 5.9 on the moment magnitude scale and its epicenter was located about west-southwest of

Anna Maria, Florida Anna Maria is a city in Manatee County, Florida, United States. The population was 968 at the 2020 census, down from 1,503 in 2010. The city occupies the northern part of Anna Maria Island and is one of three municipalities on the island. The ...

. The event was felt throughout much of the

Gulf Coast of the United States The Gulf Coast of the United States, also known as the Gulf South, is the coastline along the Southern United States where they meet the Gulf of Mexico. The coastal states that have a shoreline on the Gulf of Mexico are Texas, Louisiana, Mississ ...

and was the second earthquake of magnitude 5 or greater in the Gulf during 2006. Felt intensities, as measured on the

Mercalli intensity scale The Modified Mercalli intensity scale (MM, MMI, or MCS), developed from Giuseppe Mercalli's Mercalli intensity scale of 1902, is a seismic intensity scale used for measuring the intensity of shaking produced by an earthquake. It measures the eff ...

, were as high as IV (''Light'') in Florida, with parts of Georgia at III (''Weak'').

Characteristics

The quake was reportedly felt along the gulf coast and as far north as

Georgia Georgia most commonly refers to: * Georgia (country), a country in the Caucasus region of Eurasia * Georgia (U.S. state), a state in the Southeast United States Georgia may also refer to: Places Historical states and entities * Related to the ...

. The earthquake was the strongest in the Gulf of Mexico in 33 years and was an intraplate earthquake, an event that takes place away from the borders of tectonic plates (where most tectonic activity takes place). Earthquakes in the

Southeastern United States The Southeastern United States, also referred to as the American Southeast or simply the Southeast, is a geographical region of the United States. It is located broadly on the eastern portion of the southern United States and the southern por ...

are not common, but several strong events have occurred in the region. In 1879 close to

St. Augustine, Florida St. Augustine ( ; es, San Agustín ) is a city in the Southeastern United States and the county seat of St. Johns County on the Atlantic coast of northeastern Florida. Founded in 1565 by Spanish explorers, it is the oldest continuously inhabit ...

an earthquake damaged plaster and forced dishes off counters, and in South Carolina the

1886 Charleston earthquake The 1886 Charleston earthquake occurred about 9:50 p.m. local time August 31. It caused 60 deaths and $5–6 million ($ million in ) in damage to 2,000 buildings in the Southeastern United States. It is one of the most powerful and da ...

caused severe damage and was responsible for the deaths of sixty people. The event occurred near the Cuba Fracture Zone and was well away from the edge of the

North American Plate The North American Plate is a tectonic plate covering most of North America, Cuba, the Bahamas, extreme northeastern Asia, and parts of Iceland and the Azores. With an area of , it is the Earth's second largest tectonic plate, behind the Pacific ...

. Randy Cox, an associate professor of earth science at the

University of Memphis } The University of Memphis (UofM) is a public university, public research university in Memphis, Tennessee. Founded in 1912, the university has an enrollment of more than 22,000 students. The university maintains the Herff College of Engineering ...

in Tennessee stated that the source of strain was the

Mid-Atlantic Ridge The Mid-Atlantic Ridge is a mid-ocean ridge (a divergent or constructive plate boundary) located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world. In the North Atlantic, the ridge separates the North Ame ...

, where

seafloor spreading Seafloor spreading or Seafloor spread is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. History of study Earlier theories by Alfred Wegener an ...

was causing compression of the North American Plate. A magnitude 5.2 event in February 2006 may have been associated with the same fault zone. The epicenter of the earthquake was too far offshore for it to be well covered by onshore seismographs and the event's characteristics are therefore poorly constrained. The

focal mechanism The focal mechanism of an earthquake describes the deformation in the source region that generates the seismic waves. In the case of a fault-related event it refers to the orientation of the fault plane that slipped and the slip vector and is ...

indicated reverse faulting. The focal depth of between 14–31 km show that it occurred within the seismogenic zone, rather than on any of the many shallow growth faults in the area. The earthquake led to a reassessment of the geohazard for hydrocarbon exploration and production facilities in the Gulf. Several thousand people reported the event to the

United States Geological Survey The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, ...

but none reported any damage from the 20 second earthquake. Items were knocked from shelves and

seiche A seiche ( ) is a standing wave in an enclosed or partially enclosed body of water. Seiches and seiche-related phenomena have been observed on lakes, reservoirs, swimming pools, bays, harbors, caves and seas. The key requirement for formation o ...

s were observed in swimming pools in parts of Florida where felt intensities were reported as high as IV, including Brooksville on the west coast, Titusville on the east coast, and

Panama City Panama City ( es, Ciudad de Panamá, links=no; ), also known as Panama (or Panamá in Spanish), is the capital and largest city of Panama. It has an urban population of 880,691, with over 1.5 million in its metropolitan area. The city is locat ...

on the

panhandle A salient (also known as a panhandle or bootheel) is an elongated protrusion of a geopolitical entity, such as a subnational entity or a sovereign state. While similar to a peninsula in shape, a salient is most often not surrounded by water on ...

. In

Atlanta, Georgia Atlanta ( ) is the capital and most populous city of the U.S. state of Georgia. It is the seat of Fulton County, the most populous county in Georgia, but its territory falls in both Fulton and DeKalb counties. With a population of 498,715 ...

, the intensity was reported to be at level III.

References

External links

* {{DEFAULTSORT:Gulf Of Mexico Earthquake, 2006 Gulf of Mexico 2006 earthquakes

2006 File:2006 Events Collage V1.png, From top left, clockwise: The 2006 Winter Olympics open in Turin; Twitter is founded and launched by Jack Dorsey; The Nintendo Wii is released; Montenegro 2006 Montenegrin independence referendum, votes to declare ...

2006 natural disasters in the United States 2006 in Florida 2006 in Louisiana 2006 in Alabama September 2006 events in the United States

Characteristics

See also

References

External links