Earthquakes happen all round the world daily and they are extremely dangerous. An earthquake is caused by the movement of plates called fault. Plates are segments of the outermost rigid shell of the Earth, composed of the crust and attached upper mantle, which float on the plastic like asthenosphere. Faults are in deep underground, they are always moving slowly that we can’t even feel it. Seismologists are studying how to predict an earthquake to be safer in the earthquake by learning and studying the seismic waves. There are many earthquakes that happen around the world, occurring for many different reasons, causing damage, and helping seismologists to learn and study seismic waves.
The earthquakes happen because of the movements of plates under the ground. There are three main types of faults, Normal faults, Reverse faults, and Strike Slip faults. The faults are plates that move deep under the ground that occur earthquakes. Two plates are moving together slowly, and sometimes it gets stuck to each other. Then for a long time, the plates can’t move even they have to move. The forces keep forcing the plates to move but the plates are not moving. If this happen for a long time, the plates will suddenly move quickly. That causes the earthquake to happen. The faults that two plates shift straight down or up following the line of dip called a Normal Fault (Earthquakes). Because Normal Faults move toward to each other, they could make mountains. In the Reverse faults, one plate is overhand another plates, and moving to each other. A Reverse faults that have a fault plane of 45 angles or less is called a thrust fault (Earthquakes). In Oblique-Slip fault which is also known as Strike-Slip faults, two plates are moving sideways to the...
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Earthquakes are a natural part of the Earth’s evolution. Scientific evidence leads many geologists to believe that all of the land on Earth was at one point in time connected. Because of plate tectonic movements or earthquakes, continental drift occurred separating the one massive piece of land in to the seven major continents today. Further evidence supports this theory, starting with the Mid-Atlantic ridge, a large mass of plate tectonics, which are increasing the size of the Atlantic Ocean while shrinking the Pacific. Some scientists believe that the major plate moveme...
Earthquakes play a major role into understanding the composition and materials that exist within the Earth (Merali and Skinner, 2009, p.252). Earthquakes are the main source of insight into the inner workings of the earth, due to the nature of the seismic waves they produce. P and S waves are reflected and refracted at different boundaries within the earth, and this enables seismologists to make inferences about the internal composition and structural of planet Earth. (Merali and Skinner, 2009, p.252).
The earth is split into four layers, inner and outer core, the mantle and crust. The top of the mantle and crust make up what is like the skin of our earth (see source 2). The skin is split up like a puzzle and we call these puzzle pieces’ tectonic plates (see source 1). These plates are constantly moving and the plate boundaries (edges of the plates) move and slide past one another. Sometimes as the plates move the plate boundaries become stuck. Pressure builds up in the stuck area over time and eventually breaks. This is why earthquakes occur due to the sudden movement of the plate sliding and breaking creating a fault line to go off. The fault line is the line on which the
Earthquakes are best described as a shaking or vibration of the ground caused by breaking of rock. Sometimes they are very strong and other times you would hardly notice them. This shaking occurs when stress that builds up in the crust is suddenly released as the crust breaks free and/or slides against the other pieces of crust. Earthquakes may also be thought of as the breaking of a popsicle stick by applying pressure to both ends at the same time. Should you try this experiment , you will feel the pressure build up as you apply more force until the stick snaps. When the stick snaps you will feel an instant of pain at your fingers as the stress reduces and energy waves move throughout the stick. When the earth's crust is placed under similar types of stress, binding as the stress builds, it will also snap and release the energy into the surrounding rocks, 'ooch'. Thinking about earthquakes will become more clear if you try another experiment.
From studying the science behind the San Francisco earthquake, scientists have made a number of important discoveries involving how earthquakes function. At 5:12 on a fateful April morning in 1906, the mammoth Pacific and North American plates sheared each other at an incredible twenty-one feet along the San Andreas fault, surpassing the annual average of two inches (“San Francisco Earthquake of 1906”) (“The Great 1906 Earthquake and Fires”). A few seconds later, the destructive earthquake occurred. The ground shifted at almost five feet per second, and the shaking could be felt all the way from southern Oregon to southern Los Angeles to central Nevada (“Quick”) (“The Great 1906 San Francisco Earthquake”). In fact, the earthquake could be registered in a seismograph on Capetown, South Africa, an astounding 10,236 miles away...
U.S. Geological Survey. "The Great 1906 San Francisco Earthquake." The Great 1906 San Francisco Earthquake. United States Geological Survey, 18 July 2012. Web. 1 Mar. 2014.
Before examining the Northridge event, understanding the naturally occurring hazard that is an earthquake will help to better understand exactly what happened and why it was such an important geological event. With four distinct layers, two layers, the crust and upper portion of the mantle, compose the skin that is the surface layer of the Earth. The crust is not a single, continuous piece. It is actually several different pieces, or plates, that come together to form the puzzle that comprises the surface of the Earth. These plates are in constant motion rubbing against one another. These areas, known as fault lines, where the plates rub up against one another have spots where one plate ”gets stuck while the rest of the plate keeps moving. When the plate has moved far enough, the edges unstick and is how most of the earthquakes around the world occur” (Wald, 2012). The energy stored from the friction of the two plate...
“What Is a Concussion?” What Is a Concussion? | Brain Injury Research Institute, www.protectthebrain.org/Brain-Injury-Research/What-is-a-Concussion-.aspx. Accessed 30 Jan. 2018.
"The Great Quake: 1906-2006 / Rising from the Ashes." SFGate. N.p., n.d. Web. 10 May 2014.
Psychology is the study of the mind and the behavior of mammals. Geology is a science that deals with the history of the earth and its life, recorded in rocks. The earth is consistently moving its tectonic plates. Therefore, there may be over 100 earthquakes a day; most of these earthquakes go unnoticed by humans on the crust of the earth. Other earthquakes for example, the one in 2011 located in Japan and the Loma Prieta earthquake of 1989 (Earth- Marshak). Unfortunately, many people died in horrific ways during these deadly earthquakes, leaving thousands diagnosed with psychological disorders such as, Posttraumatic Stress Disorder and Specific Phobias directly related to the natural environment of the earth.
Convection currents deep in the mantle of the earth, begin to well up towards the surface. As the pressure increases, it sets the crustal plates in motion. There are different kinds of mountains - Volcanic, Folded, Fault-block, and Dome mountains. Volcanic mountains are formed when magma comes up through cracks in the Earth’s crust and explodes out of lava and ash. The Hawaiian volcanoes, Mt. Hood, Mt. Etna, Vesuvius, and Mt. Saint Helens is an example of volcanic mountains.
They are the earth’s crust; they move very slowly every year. As the tectonic plates slide over each other they cause earthquakes. Earthquakes produce various damaging effects this includes damage to structures of buildings, bridges and other standing formations which then...
Earthquakes are vibrations felt at the surface of the earth which are caused by disturbances of the energy in the earth's interior. These vibrations are known as seismic waves. (Skinner Robinson McVerry 1) There are different type sof seisimc waves such as Primary (P) waves, whcih travel the fastest, Secondary (S) waves which cause the earth to vibrate vertically, Surface (L) waves. P and S waves are "affected by changes in the density and the rigidity of the materials through which they pass." (Columbia Encyclopedia) Earthquakes vary in their intensity and duration. Often times they are strong enough to cause massive destriction. Tall buildings often suffer as a result of these natural disasters. In recent years this has become a larger and larger threat with both the number of large buildings, and their number of occupants increasing. In an effort to try to minimize the damage caused by earthquakes many some engineers focus primarily on designing and constructing earthquake resistant buildings. Earthquake engineers have gathered much of their information from analyzing past earthquakes, and learning which buildings can and can't withstand the tremors. The goals of these engineers is to design buildings that can withstand moderate earthquakes and obtain minimal damage, and that the buildings will not collapse lowering the probability of human deaths.
The basic science is pretty straightforward. The earth lurches from time to time because its outer shell is broken into huge, solid plates floating on a layer of molten rock that has the consistency of Silly Putty. These tectonic plates are constantly jostling each other, like rafts crowded into a small pond, and its along the boundaries where they meet that most quakes are born.
Earthquakes belong to the class of most disastrous natural hazards. They result in unexpected and tremendous earth movements. These movements results from dissemination of an enormous amount of intense energy in form of seismic waves which are detected by use of seismograms. The impact of earthquakes leaves behind several landmarks including: destruction of property, extensive disruption of services like sewer and water lines, loss of life, and causes instability in both economic and social components of the affected nation (Webcache 2).