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January 2001 El Salvador Earthquake
On 13 January 2001, at 11:33 CTZ (17:33 UTC), a 7.7 earthquake struck off the coast of Usulután Department, El Salvador, at a depth of . At least 952 people were killed; 944 in El Salvador and 8 in Guatemala, over 5,500 were injured and nearly 200 were left missing due to the earthquake; every single department in the country reported casualties and severe damage, and damage from the earthquake was reported in five countries throughout Central America. Tectonic setting El Salvador lies above the convergent boundary where oceanic crust of the Cocos plate is being subducted beneath the Caribbean plate at rate of about 72 mm per year along the Middle America Trench. This boundary is associated with earthquakes resulting from movement on the plate interface itself, such as the 1992 Nicaragua earthquake, and from faulting within both the overriding Caribbean plate and the subducting Cocos plate, such as the 1982 El Salvador earthquake. Earthquake The January 13 earthq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Time Zone
The North American Central Time Zone (CT) is a time zone in parts of Canada, the United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ..., Mexico, Central America, and a few Caribbean Islands, Caribbean islands. In parts of that zone (20 states in the US, three provinces or territories in Canada, and several border municipalities in Mexico), the Central Time Zone is affected by two time designations yearly: Central Standard Time (CST) is observed from the first Sunday in November to the second Sunday in March. It is UTC−06:00, six hours behind Coordinated Universal Time (UTC) and designated internationally as UTC−6. From the second Sunday in March to the first Sunday in November the same areas observe daylight saving time (DST), creating the designation of Central ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1982 El Salvador Earthquake
The 1982 El Salvador earthquake occurred southeast of San Salvador on 19 June at 00:21 local time (06:21 UTC). This undersea earthquake struck offshore in the Pacific Ocean and had a surface wave magnitude of 7.3 and a maximum Mercalli intensity of VII (''Very strong''). Occurring adjacent to a subduction zone at the Middle America Trench, this normal-slip shock left at least 16 and as many as 43 people dead, and many injured, and also inflicted $5 million in damage. Tectonic setting Near the Salvadorian coast, the Cocos plate is subducting beneath the Caribbean plate at the Middle America Trench. This earthquake was an intra-slab, normal-slip subduction earthquake in the subducting plate. The subduction zone and a local system of faults along the volcanic chain are two major sources of the earthquakes in El Salvador. Earthquake The mechanism of this earthquake had many similarities with the El Salvador earthquake of 13 January 2001. Intensity The intensity in San Salvad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Ilopango
Lake Ilopango is a crater lake which fills an 8 by 11 km: volcanic caldera in central El Salvador, on the borders of the San Salvador, La Paz, and Cuscatlán departments. The caldera, which contains the second largest lake in the country and is immediately east of the capital city, San Salvador, has a scalloped to high rim. Any surplus drains via the Jiboa River to the Pacific Ocean. The local military airbase, Ilopango International Airport, has annual airshows where international pilots from all over the world fly over San Salvador City and Ilopango lake. Eruptive history Four major dacitic–rhyolitic eruptions occurred during the late Pleistocene and Holocene, producing pyroclastic flows and tephra that blanketed much of the country. The caldera collapsed most recently sometime between 410 and 535 CE (based on radiocarbon dating of plant life directly related to the eruption),, esp. p.27. which produced widespread pyroclastic flows and devastated Mayan citi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Salvador
San Salvador () is the Capital city, capital and the largest city of El Salvador and its San Salvador Department, eponymous department. It is the country's largest agglomeration, serving as the country's political, cultural, educational and financial center. The Municipalities of El Salvador, municipality of San Salvador has 525,990 inhabitants (2024). The Metropolitan Area of San Salvador, which comprises the capital itself and 13 of its municipalities, has a population of 2,404,097. The urban area of San Salvador has a population of 1,600,000 inhabitants. The city is home to the ''Consejo de Ministros de El Salvador'' (Council of Ministries of El Salvador), the Legislative Assembly of El Salvador, the Supreme Court of El Salvador, and other governmental institutions, as well as the official residence of the president of El Salvador. San Salvador is located in the Salvadoran highlands, surrounded by volcanoes and prone to earthquakes. The city is also home to the Roman Catholic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuscatlán Department
Cuscatlán () is a department of El Salvador, located in the center of the country. With a surface area of , it is El Salvador's smallest department. Cuscatlán or Cuzcatlán was the name the original inhabitants of the Western part of the country gave to most of the territory that is now El Salvador. In their language it means "land of precious jewels". It was created on 22 May 1835. Suchitoto was the first capital of the department but on 12 November 1861, Cojutepeque was made the capital. It is known in producing fruits, tobacco, sugar cane, and coffee among other items. The department is famous for its chorizos from the city of Cojutepeque. Municipalities # Cuscatlán Norte # Cuscatlán Sur Districts # Candelaria # Cojutepeque # El Carmen # El Rosario # Monte San Juan # Oratorio de Concepción # San Bartolomé Perulapía # San Cristóbal # San José Guayabal San José Guayabal is a Municipalities of El Salvador, municipality in the Cuscatlán Department, Cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Paz Department (El Salvador)
La Paz () is a department of El Salvador in the south central area of the country. The capital is Zacatecoluca. La Paz has an area of 1,228 km2. The department was created in 1852. There are various caves containing rock writing. The department has a church in Zacatecoluca where the Independence Hero Dr Jose Simeon Cañas y Villacorta was born. He was known as "The Liberator of the Slaves in Central America". In 1833, Anastasio Aquino, an indigenous person, proclaimed himself as "The Emperor of the Nonualcos". Municipalities # La Paz Centro # La Paz Este # La Paz Oeste Districts # Cuyultitán # El Rosario # Jerusalén # Mercedes La Ceiba # Olocuilta # Paraíso de Osorio # San Antonio Masahuat # San Emigdio # San Francisco Chinameca # San Juan Nonualco # San Juan Talpa # San Juan Tepezontes # San Luis La Herradura # San Luis Talpa # San Miguel Tepezontes # San Pedro Masahuat # San Pedro Nonualco # San Rafael Obrajuelo # Santa María Ostuma # Santiago Nonualco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Libertad Department (El Salvador)
La Libertad () is one of the departments of El Salvador and is located in the southwest of the country. The capital is Santa Tecla. It has an area 1,653 km² and a population of 765,879 people. History It was classified as a department on January 28, 1865. The population was settled on the Ulliman Plains, which is where rubber is harvested. The city was called "Nueva Ciudad de San Salvador" (New City of San Salvador) and made the department's capital on the same date as the department was declared. The department's capital was renamed Santa Tecla on December 22, 2003. The agricultural products that are cultivated are the basic grains, balsam, sugar cane, coffee, grass, hortensia, cocoa, and fruits. They also develop the bovine, equine and pig cattle, the raising of poultry and beekeeping. It also stands out in the textile industry and the production of candles, soaps, furniture, clothes, footwear, dairy products, and many diverse products and liquors. At 12 km. to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Vicente Department
San Vicente () is a department of El Salvador in the center of the country. The capital is San Vicente. On October 4, 1834, San Vicente City of Austria and Lorenzana (Ciudad de San Vicente de Austria y Lorenzana) was made the capital of State of El Salvador during the Federal Republic of Central America. In 1840, it was no longer the capital of the State of El Salvador, but it continues to be the capital of the department. The department was created on June 12, 1824. The San Vicente department is and has a population in excess of 174,500. The forest Bosque La Joya is found in San Vicente. The Terrorism Confinement Center (CECOT) is located in the San Vicente Department in Tecoluca. Districts # San Vicente Norte # San Vicente Sur Municipalities # Apastepeque # Guadalupe # San Cayetano Istepeque # San Esteban Catarina # San Ildefonso # San Lorenzo # San Sebastián # San Vicente # Santa Clara # Santo Domingo # Tecoluca # Tepetitán # Verapaz History During the S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquake Rupture
In seismology, an earthquake rupture is the extent of slip that occurs during an earthquake in the Earth's crust. Earthquakes occur for many reasons that include: landslides, movement of magma in a volcano, the formation of a new fault, or, most commonly of all, a slip on an existing fault. Nucleation A tectonic earthquake begins by an initial rupture at a point on the fault surface, a process known as nucleation. The scale of the nucleation zone is uncertain, with some evidence, such as the rupture dimensions of the smallest earthquakes, suggesting that it is smaller than 100 m while other evidence, such as a slow component revealed by low-frequency spectra of some earthquakes, suggest that it is larger. The possibility that the nucleation involves some sort of preparation process is supported by the observation that about 40% of earthquakes are preceded by foreshocks. However, some large earthquakes, such as the M8.6 1950 India – China earthquake., have no foreshocks and it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aftershock
In seismology, an aftershock is a smaller earthquake that follows a larger earthquake, in Epicenter, the same area of the Mainshock, main shock, caused as the displaced Crust (geology), crust adjusts to the effects of the main shock. Large earthquakes can have hundreds to thousands of instrumentally detectable aftershocks, which steadily decrease in magnitude and frequency according to #Aftershock size and frequency with time, a consistent pattern. In some earthquakes the main rupture happens in two or more steps, resulting in multiple main shocks. These are known as doublet earthquakes, and in general can be distinguished from aftershocks in having similar magnitudes and nearly identical seismic waveforms. Distribution of aftershocks Most aftershocks are located over the full area of fault rupture and either occur along the fault plane itself or along other faults within the volume affected by the strain associated with the main shock. Typically, aftershocks are found up to a d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aftershocks
In seismology, an aftershock is a smaller earthquake that follows a larger earthquake, in the same area of the main shock, caused as the displaced crust adjusts to the effects of the main shock. Large earthquakes can have hundreds to thousands of instrumentally detectable aftershocks, which steadily decrease in magnitude and frequency according to a consistent pattern. In some earthquakes the main rupture happens in two or more steps, resulting in multiple main shocks. These are known as doublet earthquakes, and in general can be distinguished from aftershocks in having similar magnitudes and nearly identical seismic waveforms. Distribution of aftershocks Most aftershocks are located over the full area of fault rupture and either occur along the fault plane itself or along other faults within the volume affected by the strain associated with the main shock. Typically, aftershocks are found up to a distance equal to the rupture length away from the fault plane. The pattern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strike And Dip
In geology, strike and dip is a measurement convention used to describe the plane orientation or Attitude (geometry), attitude of a Plane (geometry), planar Geology, geologic feature. A feature's strike is the azimuth of an imagined horizontal line across the plane, and its dip is the angle of inclination (or depression angle) measured downward from horizontal. They are used together to measure and document a structure's characteristics for study or for use on a geological map. A feature's orientation can also be represented by dip and dip direction, using the azimuth of the dip rather than the strike value. Linear features are similarly measured with trend and plunge, where "trend" is analogous to dip direction and "plunge" is the dip angle. Strike and dip are measured using a compass and a clinometer. A compass is used to measure the feature's strike by holding the compass horizontally against the feature. A clinometer measures the feature's dip by recording the inclination pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
