causes of earthquake
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earthquake Causes of Earthquakes. Most earthquakes are causally related to compressional or tensional stresses built up at the margins of the huge moving lithospheric plates that make up the earth's surface (see lithosphere).
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Earthquakes & Tsunamis: Causes & Information An earthquake occurs when the pressure built up along a fault becomes stronger than the pressure holding the rocks together. Then the rocks on either side of the fault suddenly rip apart, sometimes at supersonic speeds. The two sides of the fault slide past one another, releasing the pent-up pressure.
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- Ground Shaking-Shaking of the ground caused by the passage of seismic waves near the epicenter of the earthquake is responsible for the collapse of most structures. The intensity of ground shaking depends on distance from the epicenter and on the type of bedrock underlying the area.
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Earthquakes An earthquake is the shaking of the ground cause by seismic waves. Almost all earthquakes occur when pent up stress in rocks along large, active faults (like the SAF) is suddenly released as the rock breaks.n earthquake is the shaking of the ground cause by seismic waves. Almost all earthquakes occur when pent up stress in rocks along large, active faults (like the SAF) is suddenly released as the rock breaks.
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Why Earthquakes Occur Main Content. An earthquake is ground shaking caused by a sudden movement of rock in the earth’s crust. Such movements occur along faults, which are thin zones of crushed rock separating blocks of crust.n earthquake is ground shaking caused by a sudden movement of rock in the earth’s crust. Such movements occur along faults, which are thin zones of crushed rock separating blocks of crust.
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What does earthquake mean? At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacement of the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes can also trigger landslides, and occasionally volcanic activity.
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Plate Tectonics, the Cause of Earthquakes Earthquake occurrence in different plate tectonic settings: The map below of Earth's solid surface shows many of the features caused by plate tectonics. The oceanic ridges are the asthenospheric spreading centers, creating new oceanic crust. Subduction zones appear as deep oceanic trenches.
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Earthquake At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacement of the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami.arge waves produced by an earthquake or a submarine landslide can overrun nearby coastal areas in a matter of minutes. Tsunamis can also travel thousands of kilometers across open ocean and wreak destruction on far shores hours after the earthquake that generated them.
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What is an Earthquake? Reproduced with permission from. Alice Snooke. The amplitude of the shaking caused by an earthquake depends on many factors, such as the magnitude, distance from the epicentre, depth of focus, topography, and the local ground conditions.
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What Causes Earthquakes: Information about Faults, Plate Tectonics and Earth Structure An earthquake is the ground shaking caused by a sudden slip on a fault. Stresses in the earth's outer layer push the sides of the fault together. Stress builds up and the rocks slip suddenly, releasing energy in waves that travel through the earth's crust and cause the shaking that we feel during an earthquake.
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What Causes Earthquakes: Information about Faults, Plate Tectonics and Earth Structure What Causes Earthquakes: Information about Faults, Plate Tectonics and Earth Structure. 1  if the EQ left surface evidence, such as surface ruptures or fault scarps (cliffs made by EQs). 2  if a large EQ has broken the fault since we began instrumental recordings in 1932.
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What is an Earthquake? Earthquakes are the vibrations caused by rocks breaking under stress. The underground surface along which the rock breaks and moves is called a fault plane. Earthquakes in Australia are usually caused by movements along faults as a result of compression in the Earth's crust. The size or magnitude of earthquakes is determined by measuring the amplitude of the seismic waves recorded on a seismograph and the distance of the seismograph from the earthquake.
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Earthquake Facts & Earthquake Fantasy PARTIALLY FACT: People can cause earthquakes. Earthquakes induced by human activity have been documented in the United States, Japan, and Canada. The cause was injection of fluids into deep wells for waste disposal and secondary recovery of oil, and the filling of large reservoirs for water supplies. Most of these earthquakes were minor.
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What is an Earthquake? Earthquakes are the vibrations caused by rocks breaking under stress. The underground surface along which the rock breaks and moves is called a fault plane. Earthquakes in Australia are usually caused by movements along faults as a result of compression in the Earth’s crust.
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Greatest Mysteries: What Happens Inside an Earthquake? Quakes occur when the frictional stress of the movement exceeds the strength of the rocks, causing a failure at a fault line. Violent displacement of the Earth's crust follows, leading to a release of elastic strain energy. This energy takes the form of shock waves that radiate and constitute an earthquake.
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- A Tsunami is often caused by earthquakes under large bodies of water, but there are many causes (see the related questions for answers to what causes a tsunami). The force of the earthquake causes energy to surge in all directions through the water. When the energy comes close to land and the water ….
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- That sudden breaking of the foam rubber is the earthquake. That's just what happens along a strike-slip fault. Earthquake-like seismic waves can also be caused by explosions underground. These explosions may be set off to break rock while making tunnels for roads, railroads, subways, or mines. These explosions, however, don't cause very strong seismic waves.
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Cochise College Student Papers in Geology Northridge Earthquake Earthquakes strike without any warning and there is no way of predicting them. Movement of the earth's tectonic plates causes Earthquakes. Earthquakes occur where the earth's plates meet along plate boundaries. For example as two plates move towards each other, one can be pushed down under the other one into the mantle. If this plate gets stuck, it causes a lot of pressure on surrounding rocks.
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When Do Earthquakes Occur? A: Earthquakes are usually triggered when rock located beneath the ground, on top of fault lines, breaks and suddenly releases a significant amount of energy. The immediate and rapid release of energy caused by earthquakes generates seismic waves, which cause shaking motions that start below the Earth’s surface and spread across large distances.
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What are the Causes and Effects of Earthquakes? This causes earthquakes such as the Koyna earthquake in Maharashtra. The shock waves through rocks set up by the underground testing of Atom bombs or Hydrogen bombs may be severe to cause earthquake. Effects of Earthquake Destructive Effects: Earthquake causes dismantling of buildings, bridge and other structures at or near epicenter. Many men and animals are killed or buried under collapsed houses. Rails are folded, underground wires broken. Fire breaks out inevitably in large towns. Earthquakes originate sea waves called Tsunamis. Earthquakes result in the formation of cracks and fissures on the ground formation. The earthquakes cause landslides and disturb the isostatic equilibrium. Landslide due to earthquake may block valleys to form lakes. Constructive Effects: Sometimes the earthquakes cause formation of hot springs which are very useful to people.
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- Ans: An earthquake is caused by a sudden slip on a fault. Stresses in the earth's outer layer push the sides of the fault together. Stress builds up and the rocks slips suddenly, releasing energy in waves that travel through the earth's crust and cause the shaking that we feel during an earthquake.
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- An earthquake is ground shaking caused by a sudden movement of rock in the earth’s crust. Such movements occur along faults, which are thin zones of crushed rock separating blocks of crust. Surface faulting, in which the surface of the ground along one side of a fault is displaced horizontally or vertically in relation to the ground on the other side. 2  Tsunamis, which can be triggered by earthquake-induced underwater landslides or by surface faulting that occurs on the floor of the ocean.
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Earthquakes: fault lines Earthquakes also occur far from the edges of plates, along faults. Faults are cracks in the earth where sections of a plate (or two plates) are moving in different directions. Faults are caused by all the bumping and sliding the plates do and are more common near the edges of the plates.
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CHAPTER 11 - GEOLOGIC HAZARDS Earthquakes shake the ground surface, can cause buildings to collapse, disrupt... Earthquakes shake the ground surface, can cause buildings to collapse, disrupt transport and services, and can cause fires. They can trigger landslides and tsunami – in short, earthquakes can be very destructive.