Understanding Earthquakes Nature has the power that no human can

Understanding footingquakes Nature has the function that no human shadow control it. Even though we fool the engineering science that mess like to talk ab surface and proud of it, we still andt not stop the records fury. I called it anger of nature be exercise it on the nose kills pot and causes large-scale ill-treats, which is al to the highest degree insufferable to rec everyplace or it go out be recovered in long-term, to social systems or property. Nature shows its anger in divergent ways, and we name these as natural disasters that argon alike called smashing global changes. native disasters depose happen at all time or in whatsoever place, and its unrealizable for us to do it when its pass to happen and how practically the aggrieve is going to be. Each of them has a antithetic power to stultification the universe. Some of them argon hurri sternes, tornadoes, droughts, landslides, and temblors. Of all the noxious phenomena of nature, the temblor is the most destructive, violent and frightening force.

In the past, the natural cause of seism was little understood. t slip upher were only a hardly a(prenominal) descriptions of temblors recorded up to the 18th century. One of the most habitual theories in that time was that air rushing out of caverns mystifying in the Earths interior was causing an earthquake, but today this theory seems ridiculous. on that point were a band of earthquakes that do big damages and killed many people, and again there were no possibilities to do something. According to an condition called past Earthquakes: the largest recorded earthquake in the world was a magnitude 9.5(mw) in chili pepper on May 22, 1960. More than 2,000 killed, 3,000 injured; 2,000,000 homeless, and $550 million damage in southern Chile. And too these damages continued in Hawaii because of tsunami which is caused by the earthquake, caused 61 deaths, and $75 million damage; $50 million damage in Japan, and also $500,000 damage to the west coast of United States. And again according to Historic Earthquakes The worlds deadliest recorded earthquake occurred in 1557 in central China. It infatuated a region where most people lived in caves carved from soft rock. These dwellings collapsed during the earthquake, killing an estimated 830,000 people. (http://soilslab.cfr.washington.edu/esc110/2001Spring/projects/073/historic.html) The cause of an earthquake is the sudden shimmy of large sections of the earths crust. There ar plates that are parts of the lithosphere, which is make up the uppermost part of the mantle, and also made up of the crust. There is a constant pres undisputable on these plates to execute, and at the same time land masses being pushed in concert allows movement to start. And according to an article called earthquake in Natural Forces web page: these plates form continents, differents the ocean floor, but they are always moving. The core is made up of even hotter rocks below the mantle, and currents of burning rock rise up with the mantle. These currents hand out out once they fix the bottom surface of the crust. This conduct tends to tear the crust, pulling the apart, grinding some plates against others, colliding them into 1 another. Continental drift (when major plates are slowly but steadily moved apart) also contribute, carrying plates until they collide. It is through these collisions that mountain ranges are also formed. This movement of our dynamic planet produces earthquakes and volcanoes. (http://library.thinkquest.org/C003603/english/earthquakes/thecauses.shtml?tqskip1=1&tqtime=1105) The most common cause of earthquakes is fault, which is a thin zone of oppress rock between two blocks of rock. Faulting can be any length that is from centimeters to thousands of kilometers. There are lead kinds of faults such(prenominal) as modal(prenominal) fault, reserve fault, and strike-slip fault. According to an article in nature: A normal fault drops rock on one side of the fault worst relative to the other side. The sec one is a reverse fault one uptight block is pushed up relative to rock on the other side. And the third one is Strike-slip fault that have a different type of movement than normal and reverse faults. Blocks move on either side of a reverse or normal fault slide up or down along dipping fault surface. The rocky blocks on either side of strike-slip faults, on the other hand, scrape along side-by-side. http://www2.nature.nps.gov/grd/usgsnps/deform/gfaults.html There are couple ways for us to know how a fault exists. For example; by and by an earthquake happens, there should be some kind of evidence that are left from the earthquake, and these can be surface raptures, and fault scarps. Another way to know is when a large earthquake breaks the fault, and the other way is the denser seismographic meshwork because it records the small earthquakes that are created by the fault.

There are seismal stations in the denser seismographic network that measures the movement of the ground at the site. Earthquake releases energy, when the slip of one block of rock go ons over another, and this energy makes the ground vibrate. Then the vibration pushes the adjoining tack on of ground and causes it to vibrate as well, so the energy that comes out from earthquake incites into a wave. There are two kinds of waves that are created by an earthquake, and these waves are called surface and body waves. Surface waves travel along the earths surface. According to an article in Earthquakes: Surface waves travel along the surface of the earth, rather than down into the earth. Although they are the slowest of all the earthquake waves, L waves unremarkably cause more damage than P or S waves. Body waves are vibrations that ravel through the Earth, and they are carve up in two different waves called primary and secondary waves. base waves or P waves are the fastest waves. As the article in Earthquakes mentioned P waves arrive at a precondition point before any other type of seismic wave. P waves travel through solids, liquids and gases. They move through the Earth at different speeds, depending of the density of the material through which they are moving. As they move deeper into the Earth, where material is more dense, they speed up. P waves are push-pull waves. As P waves travel, they push rock particles into the particles forrad of them, thus compressing the particles. The rock particles then bounce back. They hit the particles behind them that are being pushed forward. The particles move back and aside in the boot the waves are moving. Secondary waves, or S waves do not travel fast as more as P waves through the earth. According to article earthquakes S waves arrive at a given point after P waves do. S waves travel through solids but not through liquids and gases. Like P waves, S waves speed up when they pass through denser material.



S waves cause rock particles to move from side to side. The rock particles move at right angles to the direction of the waves. (http://www.germantown.k12.il.us/html/earthquakes.html) Earthquake has a very scary and anomalous sound that surprises you out of your sleep. You dont understand what is going on because in that time you still feel sleepy. Suddenly, your foretoken starts to shake, weird sounds coming out of your walls, small accessories start to recall from their shelves, and crash to the floor. And finally, if you are still alive, you realized that its an earthquake that scares you to death, and the bad thing is you can not do anything close it. If its not a strong one, then you are lucky, otherwise you will have some damages for sure or maybe you will die, or you will come across with the worst thing that is somebody who you love will die, and you will be just injured, and there is nothing you can do about it. All of the things that I just verbalise are coming from what I experienced about three years ago. Earthquake happened in a city called Izmit, which is just 60 miles away from Istanbul, and it was three in the morning when everybody was sleeping. It took xc seconds, and that ninety seconds felt like ninety hours. Luckily, nobody in my family died or injured, but generally there were a lot of death and homeless people in Izmit after the earthquake. There were more than twenty thousands of death people, and more than fifty thousands of people were homeless. Even though Turkish government tried to suffice people; it wasnt enough because it was an amazing tragedy that hit Turkey at an unexpected time.

It would be a extensive advantage to be able to successfully predict the earthquakes about the world because it would save countless lives and billions of dollars. Since the existence of earthquakes, people have been trying to predict earthquakes in different ways such as observing and cataloging everything from strange animal behavior to earthquake weather. The truth about this situation is helpless because there is no way we can predict an earthquakes time, magnitude, and also how many times its going to happen.

There is no way for us to celebrate earthquakes because they occur anywhere at any time, but there are possibilities that we can dilute the damage to the properties, handout of life and injuries by preparing ourselves. We can germinate our houses, work places, and also government can start programs that set people about what to do during the earthquake, and how to get prepared for an earthquake.

As you can see earthquakes are one of the most destructive phenomena of nature. Unfortunately nothing can be done to prevent an earthquake; however, we must keep advancing in our technology to better predict these catastrophes. With improved abilities in predicting earthquakes much of the scotch loss may not be prevented, but the loss of human life could certainly be reduced. Living through a horrific earthquake in 1999 only 60 miles from my home in Istanbul, Turkey, I have come to reckon that loss of life is much more tragic than the economic loss.

                 

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