The 2003 Colima earthquake occurred on 21 January, and registered a magnitude of 7.6 on the Richter scale. The epicenter was located on the Pacific coast

Pacific Coast

A country's Pacific coast is the part of its coast bordering the Pacific Ocean.-The Americas:Countries on the western side of the Americas have a Pacific coast as their western border.* Geography of Canada* Geography of Chile* Geography of Colombia...

, in the Mexican state of Colima

Colima

Colima is one of the 31 states which, with the Federal District, make up the 32 Federal Entities of Mexico. It shares its name with its capital and main city, Colima....

. The earthquake was felt as far away as Mexico City

Mexico City

Mexico City is the Federal District , capital of Mexico and seat of the federal powers of the Mexican Union. It is a federal entity within Mexico which is not part of any one of the 31 Mexican states but belongs to the federation as a whole...

, and in southern parts of the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

.

Effects

At least 29 people were killed, 300 injured, about 10,000 were left homeless, 2,005 houses were destroyed and 6,615 were damaged. Most of the deaths and damage occurred in the Villa de Álvarez area of Colima. Extensive damage (rating VIII) occurred in the city of Colima

Colima, Colima

Colima is capital of the state of the same name, a city and municipality located in the center west of Mexico. It is located near the Colima Volcano, which divides the small state from that of Jalisco. Despite being the capital, the city is not the state’s main tourist attraction, eclipsed by...

 and in Tecomán

Tecomán

Tecomán is a city and seat of the municipality of Tecomán in the Mexican state of Colima, about 50 km south of the city of Colima. In the 2005 census the city had a population of 112,726 people. It is the three-largest community in the state of Colima. The municipality has an area of...

. Some deaths and damage occurred in the states of Jalisco

Jalisco

Jalisco officially Estado Libre y Soberano de Jalisco is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is located in Western Mexico and divided in 125 municipalities and its capital city is Guadalajara.It is one of the more important states...

 and Michoacán

Michoacán

Michoacán officially Estado Libre y Soberano de Michoacán de Ocampo is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 113 municipalities and its capital city is Morelia...

 and a few buildings were damaged as far away as Guanajuato

Guanajuato

Guanajuato officially Estado Libre y Soberano de Guanajuato is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 46 municipalities and its capital city is Guanajuato....

 and Morelos

Morelos

Morelos officially Estado Libre y Soberano de Morelos is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 33 municipalities and its capital city is Cuernavaca....

. The quake was felt strongly (rating VI) in parts of Mexico City

Mexico City

Mexico City is the Federal District , capital of Mexico and seat of the federal powers of the Mexican Union. It is a federal entity within Mexico which is not part of any one of the 31 Mexican states but belongs to the federation as a whole...

. It was also felt in most of Mexico and in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 in Corpus Christi, Texas

Corpus Christi, Texas

Corpus Christi is a coastal city in the South Texas region of the U.S. state of Texas. The county seat of Nueces County, it also extends into Aransas, Kleberg, and San Patricio counties. The MSA population in 2008 was 416,376. The population was 305,215 at the 2010 census making it the...

, Dallas, Texas

Dallas, Texas

Dallas is the third-largest city in Texas and the ninth-largest in the United States. The Dallas-Fort Worth Metroplex is the largest metropolitan area in the South and fourth-largest metropolitan area in the United States...

 and El Paso, Texas

El Paso, Texas

El Paso, is a city in and the county seat of El Paso County, Texas, United States, and lies in far West Texas. In the 2010 census, the city had a population of 649,121. It is the sixth largest city in Texas and the 19th largest city in the United States...

. Occupants of high-rise buildings in Houston, Texas

Houston, Texas

Houston is the fourth-largest city in the United States, and the largest city in the state of Texas. According to the 2010 U.S. Census, the city had a population of 2.1 million people within an area of . Houston is the seat of Harris County and the economic center of , which is the ...

 also reported feeling its effects. Landslides closed a segment of the Colima-Guadalajara Highway and the port of Manzanillo. Power and telephone outages occurred in Mexico City. A local tsunami

Tsunami

A tsunami is a series of water waves caused by the displacement of a large volume of a body of water, typically an ocean or a large lake...

 of about 1 m (peak-to-trough) was recorded at Manzanillo. A seiche

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 and seas...

 was observed on Lake Pontchartrain

Lake Pontchartrain

Lake Pontchartrain is a brackish estuary located in southeastern Louisiana. It is the second-largest inland saltwater body of water in the United States, after the Great Salt Lake in Utah, and the largest lake in Louisiana. As an estuary, Pontchartrain is not a true lake.It covers an area of with...

 in the US state of Louisiana

Louisiana

Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

, and sediment was stirred up in several Louisiana wells.

Tectonic summary

This shallow earthquake occurred in a seismically active zone near the coast of central Mexico. The earthquake occurred near the juncture of three tectonic plates: the North American Plate to the northeast, the Rivera Plate to the northwest, and the Cocos Plate to the south. Both the Rivera Plate and the Cocos Plate are being subsumed beneath the North American Plate. The slower subducting Rivera Plate is moving northwest at about 2 cm per year relative to the North American Plate and the faster Cocos plate is moving in a similar direction at a rate of about 4.5 cm per year.

Several significant earthquakes have occurred near the recent event. In 1932, a magnitude 8.4 thrust earthquake struck about 100 km to the north-northwest. On 9 October 1995, a magnitude 8.0 earthquake struck about 50 km to the northwest killing at least 49 people and leaving 1,000 homeless. The most deadly earthquake in the region occurred about 170 km to the south-east on 19 September 1985. This magnitude 8.0 earthquake

1985 Mexico City earthquake

The 1985 Mexico City earthquake, a magnitude 8.0 earthquake that struck Mexico City on the early morning of 19 September 1985 at around 7:19 AM , caused the deaths of at least 10,000 people and serious damage to the greater Mexico City Area. The complete seismic event...

killed at least 9,500 people, injured about 30,000, and left 100,000 people homeless.