Assignment on earthquake

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assignment on earthquake

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Such earthquakes can be an early warning of volcanic eruptions. Most of the worlds earthquakes (90, and 81 of the largest) take place in the 40,000 km long, horseshoe-shaped zone called the circum-Pacific seismic belt, known as the pacific Ring of Fire, which for the most part bounds the pacific Plate. Massive earthquakes tend to occur along other plate boundaries, too, such as along the himalayan mountains. With the rapid growth of mega-cities such as Mexico city, tokyo and Tehran, in areas of high seismic risk, some seismologists are warning that a single quake may claim the lives of up to 3 million people. The strength of the earthquakes is changing according to its distance. . In  xx century there were attempts to classify earthquakes according to their damages to our lives, geological environment and etc. In 1902 in Italy by the juzeppe merkali has been adopted the scale of 12 points.

Assignment and, earthquake, homework help

The shifting masses send out shock waves the that may be powerful enough to alter the surface of the earth, thrusting up cliffs and opening great cracks in the ground and cause great damage collapse of buildings and other man-made structures, broken power and gas lines. The word earthquake is used to describe any seismic event whether natural or caused by humans that generate seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. An earthquakes point of initial rupture is called its focus or hypocenter. The epicenter is the point at ground level directly above the hypocenter. Occurrences and Classifications of Earthquake, earthquakes may occur naturally or as a result of human activities. Smaller earthquakes can also be caused by volcanic activity, landslides, mine blasts, and nuclear experiments. Most naturally occurring earthquakes are related to the tectonic nature of the earth. Most of the earthquakes energy is used to power the earthquake fracture growth and is converted into heat, or is released to friction. The majority of tectonic earthquakes originate at depths not exceeding tens of kilometers. Earthquakes may also occur in volcanic regions and are caused there both by tectonic faults and by the movement of magma in volcanoes.

Earthquake, definition, earthquake is a sudden movement of the earths lithosphere (its crust and upper essay mantle). Earthquakes are caused by the release of built-up stress within rocks along geologic faults or by the movement of magma in volcanic areas. They are usually followed by aftershocks. It is also known as a quake, tremor or temblor. At the earths surface, earthquakes may manifest themselves by a shaking or displacement of the ground. Sometimes, they cause tsunamis, which may lead to loss of life and destruction of property. An earthquake is caused by tectonic plates getting stuck and putting a strain on the ground. The strain becomes so great that rocks give way by breaking and sliding along fault planes.

assignment on earthquake

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Austin, texas : Holt, rinehart kites Winston. 2.0.1 "What are aftershocks, foreshocks, and earthquake clusters?". United States geological Survey. Retrieved may 11, 2009. "Earthquake swarms at Yellowstone". "Poseidons horses: plate tectonics and earthquake storms in the late Bronze age aegean and Eastern Mediterranean ". Journal of Archaeological Science 27 : 4363. usgs poster of the near the east coast of Honshu, japan Earthquake xmas of Magnitude.9 pacific Tsunamy warning Center.

Different combinations are used. Square, rectangular, and shell-shaped buildings can withstand earthquakes better than skyscrapers. To reduce stress, a building's ground floor can be supported by extremely rigid, hollow columns, while the rest of the building is supported by flexible columns inside the hollow columns. Another method is to use rollers or rubber pads to separate the base columns from the ground, allowing the columns to shake parallel to each other during an earthquake. To help prevent a roof from collapsing, builders make the roof out of light-weight materials. Outdoor walls are made with stronger and more reinforced materials such as steel or reinforced concrete. During an earthquake flexible windows may help hold the windows together so they dont break.

Essay on earth quake - how to compose a perfect Essay: Finest

assignment on earthquake

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4 Sometimes a series of earthquakes occur in a sort of earthquake storm, where the earthquakes strike a fault in clusters, each triggered by the shaking or stress redistribution of the previous earthquakes. Similar to aftershocks but on adjacent segments of fault, these storms occur over the course of years, and with some of the later earthquakes as damaging as the early ones. Such a pattern occurred in the north Anatolian fault in Turkey in the 20th century. 5 6 main article: Tsunami Animation of the 2011 Sendai tsunami. Tsunami or a chain of fast moving waves in the ocean caused by powerful earthquakes is a very serious challenge for people's safety and for earthquake engineering. Those waves can inundate coastal areas, destroy houses and even swipe away whole towns. 7 This is a danger for the whole mankind.

Unfortunately, tsunamis can not be prevented. However, there are warning systems 8 which may warn the population before the big waves reach the land to let them enough time to rush build to safety. Main article: Earthquake engineering Some places, such as Japan or California, have many earthquakes and many inhabitants. There, it is good practice to construct houses and other buildings which will resist collapse in an earthquake. This is called seismic design or " earthquake-proofing ". Earthquake-proof buildings are constructed to withstand the destructive force of an earthquake. This depends upon its type of construction, shape, mass distribution, and rigidity.

In luoyang in 133 ad, it detected an earthquake 400 to 500 km (250 to 310 mi) away there are three main types of geological fault that may cause an earthquake: normal, reverse (thrust) and strike-slip. Normal faults occur mainly in areas where the crust is being extended. Reverse faults occur in areas where the crust is being shortened. Strike-slip faults are steep structures where the two sides of the fault slip horizontally past each other. Most earthquakes form part of a sequence, related to each other in terms of location and time.


2 Most earthquake clusters consist of small tremors which cause little to no damage, but there is a theory that earthquakes can recur in a regular pattern. 3 A foreshock is an earthquake that occurs before a larger earthquake, called the mainshock. An aftershock is an earthquake that occurs after a previous earthquake, the mainshock. An aftershock is in the same region of the main shock but always of a smaller magnitude. Aftershocks are formed as the crust adjusts to the effects of the main shock. 2 Earthquake swarms are sequences of earthquakes striking in a specific area within a short period of time. They are different from earthquakes followed by a series of aftershocks by the fact that no single earthquake in the sequence is obviously the main shock, therefore none have notably higher magnitudes than the other. An example of an earthquake swarm is the 2004 activity at Yellowstone national Park.

Essay on, earthquake in Nepal major Tests

Main article: plate tectonics Earthquakes are caused by tectonic movements in the friendship earth's crust. The main cause is when tectonic plates ride one over the other, causing orogeny (mountain building and severe earthquakes. The boundaries between moving plates form the largest fault surfaces on Earth. When they stick, thesis motion between the plates leads to increasing stress. This continues until the stress rises and breaks, suddenly allowing sliding over the locked portion of the fault. This releases the stored energy as shock wave. The san Andreas fault in San Francisco, and Rift valley in Africa are faults like this. Replica of ancient seismometer with pendulum sensitive to ground tremors.

assignment on earthquake

Check others around you too. Move carefully and look out for fallen things. There may be aftershocks or smaller earthquakes quite soon after. If you want to leave the building after the shaking stops, football use the stairs, never use elevators b) If you are outdoors :-, stay away from tall buildings, trees, street lamps, and power lines. Crouch down and cover your head. Earthquakes sometimes hit cities and kill hundreds of thousands of people. Most earthquakes happen along the. Pacific Ring of Fire but the biggest ones mostly happen in other places. Tectonically active places are places where earthquakes or volcanic eruptions are frequent.

numbered 0-9. Scientists cannot view a major earthquake beforehand. They do know where earthquakes may occur, such as close to the fault lines. Advice on what to do in an earthquake: a) If you are indoors:-, take cover under a table or bench. If there is no table or desk, sit against a wall away from things that might fall on you and stay away from windows, bookcases or tall, heavy furniture. Wait in your safety spot until the shaking stops and then check to see if you are hurt.

Large earthquakes can take down buildings and cause death and injury. Earthquakes are measured using observations from seismometers. The magnitude of an earthquake, and the intensity of shaking, is usually reported on the. The richter Scale was invented by Charles Francis resume Richter in 1935. On the scale, 2 is scarcely noticeable, and magnitude 5 (or more) causes damage over a wide area. An earthquake under the ocean can cause a tsunami. This can cause just as much death and destruction as the earthquake itself. Landslides can happen, too. Earthquakes are part of the earth's rock cycle.

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An earthquake (or quakes, tremors) is the shaking of the surface of the. They are caused xmas by sudden movements of the earth's tectonic plates. Earthquakes can be extremely violent or so slight that they only register on instruments. The study of earthquakes is called seismology. 1, earthquakes are usually quite brief, but may repeat. The sudden release of tension in the tectonic plates sends waves of energy that travel through the earth. Seismology studies the cause, frequency, type and size of earthquakes. There are large earthquakes and small earthquakes.


Assignment on earthquake
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