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1787 New Spain Earthquake
The 1787 New Spain earthquake, also known as the San Sixto earthquake, occurred on 28 March at 11:30 local time (17:30 UTC). It caused a large tsunami that affected the coast of the Puebla Intendancy (includes the current state of Guerrero) and the Oaxaca Intendancy (currently Oaxaca) in Southwestern New Spain (currently part of Mexico). With an estimated magnitude of 8.6 on the moment magnitude scale, it was more powerful than any instrumentally recorded Mexican earthquake. Tectonic setting Southwestern Mexico lies above the convergent boundary where the Cocos Plate is being subducted below the North American Plate at a rate of 6.4 cm/yr. The dip of the subducting slab is about 15° as defined by focal mechanisms and earthquake hypocenters. Seismicity in this area is characterised by regular megathrust earthquakes along the plate interface. Earthquake The earthquake was reported as lasting between 6 and 7 minutes. It was followed by three strong aftershocks on 29 March ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megathrust Earthquake
Megathrust earthquakes occur at convergent plate boundaries, where one tectonic plate is forced underneath another. The earthquakes are caused by slip along the thrust fault that forms the contact between the two plates. These interplate earthquakes are the planet's most powerful, with moment magnitudes (''Mw'') that can exceed 9.0. Since 1900, all earthquakes of magnitude 9.0 or greater have been megathrust earthquakes. The thrust faults responsible for megathrust earthquakes often lie at the bottom of oceanic trenches; in such cases, the earthquakes can abruptly displace the sea floor over a large area. As a result, megathrust earthquakes often generate tsunamis that are considerably more destructive than the earthquakes themselves. Teletsunamis can cross ocean basins to devastate areas far from the original earthquake. Terminology and mechanism The term ''megathrust'' refers to an extremely large thrust fault, typically formed at the plate interface along a subduction zon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypocenter
In seismology, a hypocenter or hypocentre () is the point of origin of an earthquake or a subsurface nuclear explosion. A synonym is the focus of an earthquake. Earthquakes An earthquake's hypocenter is the position where the strain energy stored in the rock is first released, marking the point where the fault begins to rupture.''The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus.'' This occurs directly beneath the epicenter, at a distance known as the ''hypocentral depth'' or ''focal depth''. The focal depth can be calculated from measurements based on seismic wave phenomena. As with all wave phenomena in physics, there is uncertainty in such measurements that grows with the wavelength In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats. It is the distance between co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In Mexico
This is a partial list of earthquakes in Mexico. This list considers every notable earthquake felt or with its epicenter within Mexico's current borders and maritime areas. Geology Mexico lies within two seismically active earthquake zones. The Baja California peninsula lies near the boundary of the Pacific Plate and the North American Plate, while southern Mexico lies just north of the boundary between the North American Plate and the Cocos and Rivera tectonic plates. The Cocos Plate is subducting under the North American Plate at a rate of per year, while the Pacific and Rivera plates are moving northwest relative to the North American Plate. Southern Mexico also contains numerous faults, which causes that section of the country to have high tectonic activity. Northeastern Mexico and the Yucatan Peninsula are not as seismically active as the area close to the boundary between the North American and Cocos plates, but destructive earthquakes can still occur in those areas. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1906 Ecuador–Colombia Earthquake
The 1906 Ecuador–Colombia earthquake occurred at 10:36:10 (UTC+5) on Wednesday January 31, 1906 off the coast of Ecuador, near Esmeraldas. The earthquake had a moment magnitude of 8.8 and triggered a destructive tsunami that caused at least 500 casualties on the coast of Colombia. Tectonic setting The earthquake occurred along the boundary between the Malpelo Plate, formerly considered the northeastern part of the Nazca Plate, and the North Andes Plate. The earthquake is likely to be a result of thrust-faulting, caused by the subduction of the Coiba, Malpelo and Nazca Plates beneath the North Andes and South American Plates. The coastal parts of Ecuador and Colombia have a history of strong megathrust earthquakes originating from this Malpelo-North Andes plate boundary. Damage The greatest damage from the tsunami occurred on the coast between Río Verde, Ecuador and Micay, Colombia. Estimates of the number of deaths caused by the tsunami vary between 500 and 1,500. Char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexico City
Mexico City ( es, link=no, Ciudad de México, ; abbr.: CDMX; Nahuatl: ''Altepetl Mexico'') is the capital city, capital and primate city, largest city of Mexico, and the List of North American cities by population, most populous city in North America. One of the world's Globalization and World Cities Research Network, alpha cities, it is located in the Valley of Mexico within the high Mexican central plateau, at an altitude of . The city has 16 Boroughs of Mexico City, boroughs or ''demarcaciones territoriales'', which are in turn divided into List of neighborhoods in Mexico City, neighborhoods or ''colonias''. The 2020 population for the city proper was 9,209,944, with a land area of . According to the most recent definition agreed upon by the federal and state governments, the population of Greater Mexico City is 21,804,515, which makes it the list of largest cities#List, sixth-largest metropolitan area in the world, the second-largest urban area, urban agglomeration in the Weste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiapas
Chiapas (; Tzotzil and Tzeltal: ''Chyapas'' ), officially the Free and Sovereign State of Chiapas ( es, Estado Libre y Soberano de Chiapas), is one of the states that make up the 32 federal entities of Mexico. It comprises 124 municipalities and its capital and largest city is Tuxtla Gutiérrez. Other important population centers in Chiapas include Ocosingo, Tapachula, San Cristóbal de las Casas, Comitán, and Arriaga. Chiapas is the southernmost state in Mexico, and it borders the states of Oaxaca to the west, Veracruz to the northwest, and Tabasco to the north, and the Petén, Quiché, Huehuetenango, and San Marcos departments of Guatemala to the east and southeast. Chiapas has a significant coastline on the Pacific Ocean to the southwest. In general, Chiapas has a humid, tropical climate. In the northern area bordering Tabasco, near Teapa, rainfall can average more than per year. In the past, natural vegetation in this region was lowland, tall perennial rain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 effects of an earthquake at a given location, distinguished from the earthquake's inherent force or strength as measured by seismic magnitude scales (such as the "" magnitude usually reported for an earthquake). While shaking is caused by the seismic energy released by an earthquake, earthquakes differ in how much of their energy is radiated as seismic waves. Deeper earthquakes also have less interaction with the surface, and their energy is spread out across a larger volume. Shaking intensity is localized, generally diminishing with distance from the earthquake's epicenter, but can be amplified in sedimentary basins and certain kinds of unconsolidated soils. Intensity scales empirically categorize the intensity of shaking based on the ef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Geophysical Data Center
The United States National Geophysical Data Center (NGDC) provided scientific stewardship, products and services for geophysical data describing the solid earth, marine, and solar-terrestrial environment, as well as earth observations from space. In 2015, NGDC was merged with the National Climatic Data Center (NCDC) and the National Oceanographic Data Center (NODC) into the National Centers for Environmental Information (NCEI). Location and controlling bodies The NGDC, was located in Boulder, Colorado as a part of the US Department of Commerce (USDOC), National Oceanic & Atmospheric Administration (NOAA), National Environmental Satellite, Data and Information Service (NESDIS). Data holdings NGDC's data holdings contained more than 300 digital and analog databases, some of which were very large. As technology advanced, so did the search for more efficient ways of preserving these data. This data is now maintained by the NCEI. Data contributors NGDC worked closely with con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tulancingo
Tulancingo (officially Tulancingo de Bravo; Otomi: Ngu̱hmu) is the second-largest city in the Mexican state of Hidalgo. It is located in the southeastern part of the state and also forms one of the 84 municipalities of Hidalgo, as well as the Archdiocese of Tulancingo. Located 93 km from Mexico City, this area is the most important wool textile producer in the country and was home to El Santo, Mexico's most famous lucha libre wrestler. It is also home to the Huapalcalco archeological site, which was the forerunner to the Teotihuacan civilization. The name derives from the Nahuatl words “tule” and “tzintle” which mean “in or behind the reeds.” This is confirmed by its Aztec glyph. History The area is home to some of the oldest settlements in Latin America in Huapalcalco and El Pedregal. These first settlements have been attributed to the Olmecs, Xicalancas and other tribes. A city was founded in 645 BCE by the Toltecs with the name Tolancingo as part of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tehuantepec
Tehuantepec (, in full, Santo Domingo Tehuantepec) is a city and municipality in the southeast of the Mexican state of Oaxaca. It is part of the Tehuantepec District in the west of the Istmo Region. The area was important in pre Hispanic period as part of a trade route that connected Central America with what is now the center of Mexico. Later it became a secondary capital of the Zapotec dominion, before it was conquered by the Spanish in the early 16th century. The city is still the center of Zapotec culture in the Isthmus of Tehuantepec and is the second largest in the region. The city is known for its women and their traditional dress, which was adopted by Frida Kahlo. Tehuantepec has a reputation for being a matriarchal society. Women dominate the local markets and are known to taunt men. However, political power is still the domain of men. The city experienced a short economic boom in the early 20th century related to a rail line that was built linking the two oceans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morelia
Morelia (; from 1545 to 1828 known as Valladolid) is a city and municipal seat of the municipality of Morelia in the north-central part of the state of Michoacán in central Mexico. The city is in the Guayangareo Valley and is the capital and largest city of the state. The main pre-Hispanic cultures here were the Purépecha and the Matlatzinca, but no major cities were founded in the valley during this time. The Spanish took control of the area in the 1520s. The Spanish under Viceroy Antonio de Mendoza founded a settlement here in 1541 with the name of Valladolid, which became rival to the nearby city of Pátzcuaro for dominance in Michoacán. In 1580, this rivalry ended in Valladolid's favor and it became the capital of the viceregal province. After the Mexican War of Independence, the city was renamed Morelia in honor of José María Morelos, who hailed from the city. In 1991, the city was declared a UNESCO World Heritage Site for its well-preserved historical buildings and la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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