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1995 Chiapas Earthquake
The 1995 Chiapas earthquake occurred on . The epicenter was located in Ocozocoautla de Espinosa, in the state of Chiapas, Mexico, near Tuxtla Gutiérrez. It had a magnitude of 7.2, or 6.5. Building damage was reported. Around 70 people were reported injured. In Tuxtla Gutiérrez, telephone and electricity services were momentarily interrupted. This earthquake could be felt strongly in Mexico City and in many parts of southern Mexico. It could also be felt in Guatemala and El Salvador. The centroid mechanism is of thrust faulting with a small strike-slip component. The rupture of this earthquake propagated from NW to SE over a distance of about 30 km. The duration of the rupture was about 17 seconds. The earthquake was resulted from the internal deformation of the Cocos Plate, which is subducting beneath 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 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subducting
Subduction is a geological process in which the oceanic lithosphere is recycled into the Earth's mantle at convergent boundaries. Where the oceanic lithosphere of a tectonic plate converges with the less dense lithosphere of a second plate, the heavier plate dives beneath the second plate and sinks into the mantle. A region where this process occurs is known as a subduction zone, and its surface expression is known as an arc-trench complex. The process of subduction has created most of the Earth's continental crust. Rates of subduction are typically measured in centimeters per year, with the average rate of convergence being approximately two to eight centimeters per year along most plate boundaries. Subduction is possible because the cold oceanic lithosphere is slightly denser than the underlying asthenosphere, the hot, ductile layer in the upper mantle underlying the cold, rigid lithosphere. Once initiated, stable subduction is driven mostly by the negative buoyancy of the dens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of 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 rainforest, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1995 In Mexico
Events in the year 1995 in Mexico. Incumbents Federal government * President: Ernesto Zedillo * Interior Secretary (SEGOB): Esteban Moctezuma (until 28 June), Emilio Chuayffet (starting 28 June) * Secretary of Foreign Affairs (SRE): José Ángel Gurría * Communications Secretary (SCT): Carlos Ruiz Sacristán * Secretary of Defense (SEDENA): Enrique Cervantes Aguirre * Secretary of Navy: José Ramón Lorenzo Franco * Secretary of Labor and Social Welfare (STPS): Santiago Oñate Laborde (until 18 August) * Secretary of Welfare: Carlos Rojas Gutiérrez * Secretary of Public Education: Fausto Alzati/Miguel Limón Rojas * Tourism Secretary (SECTUR): Silvia Hernández Enríquez * Secretary of the Environment (SEMARNAT): Julia Carabias Lillo * Secretary of Health (SALUD): Juan Ramón De La Fuente Supreme Court * President of the Supreme Court: Governors * Aguascalientes: Otto Granados Roldán, (Institutional Revolutionary Party, PRI) * Baja California **Ernesto Ruffo Ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1995 Earthquakes
This is a list of earthquakes in 1995. Only earthquakes of magnitude 6 or above are included, unless they result in damage or casualties, or are notable for some other reason. All dates are listed according to UTC time. By death toll By magnitude By month January Kozani–Grevena earthquake There was a 6.6 Mw earthquake that occurred in the states of Kozani and Grevena, Greece on May 13, 1995. Neftegorsk earthquake The 1995 Neftegorsk earthquake was a 7.1 Mw (7.3 MS) earthquake that devastated the town of Neftegorsk in northern Sakhalin Island, Russia on May 27, 1995 at 23:03 Russian time (13:03 UTC). Neftegorsk was nearly destroyed completely by the earthquake. Approximately 2,000 of the 3,176 residents in the town were killed. Myanmar–China earthquake The 1995 Myanmar–China earthquake occurred on July 11 at 21:46 UTC in Shan State, Myanmar, near the border with Yunnan. It measured 7.3 and was assigned a maximum intensity of VIII. At least 11 people ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquakes In Mexico
An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from those that are so weak that they cannot be felt, to those violent enough to propel objects and people into the air, damage critical infrastructure, and wreak destruction across entire cities. The seismic activity of an area is the frequency, type, and size of earthquakes experienced over a particular time period. The seismicity at a particular location in the Earth is the average rate of seismic energy release per unit volume. The word ''tremor'' is also used for non-earthquake seismic rumbling. At the Earth's surface, earthquakes manifest themselves by shaking and displacing or disrupting the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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, and the natural hazards that threaten it. The organization's work spans the disciplines of biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility. The agency was founded on March 3, 1879. The USGS is a bureau of the United States Department of the Interior; it is that department's sole scientific agency. The USGS employs approximately 8,670 people and is headquartered in Reston, Virginia. The USGS also has major offices near Lakewood, Colorado, at the Denver Federal Center, and Menlo Park, California. The current motto of the USGS, in use since August 1997, is "science for a changing world". The agency's previous slogan, adopted on the occasion of its hundredt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Plate (which borders the plate to the west). It extends eastward to the Mid-Atlantic Ridge and westward to the Chersky Range in eastern Siberia. The plate includes both continental and oceanic crust. The interior of the main continental landmass includes an extensive granitic core called a craton. Along most of the edges of this craton are fragments of crustal material called terranes, which are accreted to the craton by tectonic actions over a long span of time. It is thought that much of North America west of the Rocky Mountains is composed of such terranes. Boundaries The southern boundary with the Cocos Plate to the west and the Caribbean Plate to the east is a transform fault, represented by the Swan Islands Transform Fault unde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cocos Plate
The Cocos Plate is a young oceanic tectonic plate beneath the Pacific Ocean off the west coast of Central America, named for Cocos Island, which rides upon it. The Cocos Plate was created approximately 23 million years ago when the Farallon Plate broke into two pieces, which also created the Nazca Plate. The Cocos Plate also broke into two pieces, creating the small Rivera Plate. The Cocos Plate is bounded by several different plates. To the northeast it is bounded by the North American Plate and the Caribbean Plate. To the west it is bounded by the Pacific Plate and to the south by the Nazca Plate. __TOC__ Geology The Cocos Plate was created by sea floor spreading along the East Pacific Rise and the Cocos Ridge, specifically in a complicated area geologists call the Cocos-Nazca spreading system. From the rise the plate is pushed eastward and pushed or dragged (perhaps both) under the less dense Caribbean Plate, in the process called subduction. The subducted leading edge heats ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiapas
Chiapas (; Tzotzil language, Tzotzil and Tzeltal language, 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 Political divisions of Mexico, 32 federal entities of Mexico. It comprises Municipalities of Chiapas, 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, 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 Department, Petén, Quiché Department, Quiché, Huehuetenango Department, Huehuetenango, and San Marcos Department, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strike-slip
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thrust Faulting
A thrust fault is a break in the Earth's crust, across which older rocks are pushed above younger rocks. Thrust geometry and nomenclature Reverse faults A thrust fault is a type of Fault (geology)#Dip-slip faults, reverse fault that has a strike and dip, dip of 45 degrees or less. If the angle of the fault plane is lower (often less than 15 degrees from the horizontal) and the displacement of the overlying block is large (often in the kilometer range) the fault is called an ''overthrust'' or ''overthrust fault''. Erosion can remove part of the overlying block, creating a ''fenster'' (or ''Window (geology), window'') – when the underlying block is exposed only in a relatively small area. When erosion removes most of the overlying block, leaving island-like remnants resting on the lower block, the remnants are called ''klippen'' (singular ''klippe''). Blind thrust faults If the fault plane terminates before it reaches the Earth's surface, it is referred to as a ''blind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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