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Impacts of earthquake hazards
Effects of earthquake Essay
Impacts of an earthquake
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Introduction
There are about 15 tectonic or lithospheric plates on the earth’s surface, which have different size and move relative to one another over the earth’s surface. As a result, the crust around the boundaries of the plates bends or deforms, accumulating strong energy during these processes (Briggs, 2006). When the strain becomes too great to bear by the crust in the future, the crust will snap or slip causing earthquakes. As a type of geophysical hazard, earthquakes are inevitable for mankind living on the Earth, which destroy tremendous buildings, and take human life away. However, influences of earthquakes can be reduced if people take appropriate actions. This report provide an overview of two earthquakes that happened in Haiti and Chile in 2010, and compare and contrast these two earthquakes to see how the consequences of earthquakes can be reduced.
Introduction of The Chile Earthquake
The Chilean earthquake on 27 February 2010 occurred at 03:34:17 local time (UTC-3), with a magnitude of 8.5 Mw (United Nations, 2010). This earthquake occurred on the boundary of the Nazca and South American tectonic plates which are converging at a rate of 70 mm per year. The earthquake occurred as thrust-faulting on the interface between the two plates, with the Nazca plate moving down and landward below the South American plate (United Nations, 2010). The epicenter was located on the coast approximately 8 km west of the town of Curanipe and 115 km north-northeast of Chile’s second-largest city, Concepción (United Nations, 2010).
Introduction of The Haitian Earthquake
The Haitian earthquake on 12 January 2010 occurred at 16:53 local time (21:53 UTC), with a magnitude of 7.0 Mw, and the epicenter is near the town of Leogane, appr...
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...d within the rupture zone of the 1835 event experienced by Charles Darwin.
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The Haiti earthquake that occurred on January 12, 2010 just fifteen miles south of the Haitian capital of Port-au-Prince was a severely large-scale earthquake, at a magnitude of 7.0. The initial shock was then followed by a series of aftershocks with magnitudes ranging up to 5.9. Over three hundred thousand people died due to this extreme chaos. Many buildings collapsed and disintegrated under the force of the quake; both the cathedral and National Palace in Port-au-Prince were heavily damaged. In the aftermath of this tragedy, efforts to aid the people of Haiti with medical assistance, water, and food were hampered by the loss of communication lines as well as by roads blocked by debris. Over one million people were left homeless due to this quake. Two days after the earthquake, journalist Leonard Pitts wrote “Sometimes the Earth is Cruel,” an article describing how the people of Haiti responded to the disaster. In “Sometimes the Earth is Cruel,” a major theme is that some things are inevitable.
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 are the most powerful and with the largest magnitude of 9 on the Richter scale. The Cascadia Subduction Zone is a bit more complicated than the other two types of earthquakes. The zone separates the Juan de Fuca plates and the North American plate, subduction earthquakes happen when one plate is pushing beneath each other.... ... middle of paper ...
The Haitian government’s lack of preparedness for earthquakes despite the fact that earthquakes are common to the region is indicative of the governments inability and lack of resources to properly plan and protect it’s population against natural disasters. This lack of preparedness is not an isolated incident. Prior to the disaster, the World Bank and others were working with the Haitian government to incorporate disaster risk management into Haiti’s development strategy and to develop its capacity for disaster response. This capacity building was in its early stages of development when the earthquake hit, on January 12, 2010, and was mainly focused on hurricanes, which are the most common cause of natural disaster on the island (Margesson, 2010, p. 4).
The story of Haiti’s healthcare system is unfortunately tied all too closely to disaster, both man-made and nature-born. This paper will briefly discuss the pre-2010 earthquake healthcare environment in Haiti as the uncertainty that exists provides little opportunity to provide a reasoned understanding of its current national healthcare status.
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...
benchmark for the future, and integrated investigation into the effects of earthquakes in the U.S.
An earthquake of magnitude 7.0 hit the island of Haiti on January 12, 2010, killing anywhere from 100,000 to 300,000 people, injuring another 300,000 others, and leaving over 1.5 million without homes (Fleddermann, 2012, p.116). The majority of the destruction and human toll occurred in Port au Prince, the capital city of Haiti, although the effects of the earthquake were spread throughout the island. Aside from the many people who died, were injured, or left homeless, those involved in this disaster are the Haitian government, the United Nations, civil engineers, the press, relief organizations, and the United States. Although initially perceived as simply a natural disaster, it becomes apparent through further research that the degree of loss experienced might have been lessened if certain procedures and codes were in place and followed to increase the safety and integrity of the buildings in Haiti.
The effects caused by earthquakes are devastating. They cause loss of human life and have effects on infrastructure and economy. Earthquakes can happen at any time anywhere. In January 12, 2010 an earthquake of a magnitude of 7.0 hit the nation of Haiti. An estimation of 316,000 people were killed, and more than 1.3 million Haitians were left homeless (Earthquake Information for 2010). Haiti was in a terrified chaos. After the earthquake, families were separated because many of the members were killed. Homes, schools, and hospitals were demolished. People lost their most valuable belongings. It will take time for the country to recover from this terrible disaster. The long damages are economic issues, health-state, and environmental issues that effect in the beautiful island of Haiti.
The epicenter of the earthquake in Alaska was about 10km east of the College Fiord, approximately 90km west of Valdez and 120km east of Anchorage, Alaska largest city. The earthquake was felt about 1,300,000 square kilometers away from the epicenter. (Christensen, Doug PhD.) About 30 kilometers deep, the first slip occurred under northern Prince William Sound, and an 800 kilometer rupture in the rocks extended horizontally, roughly parallel to the Aleutian trench. (Bolt) The cause of this massive earthquake was the vertical displacement of northwest motion of the Pacific plate. Also, it was estimated that about 200,000 square kilometers of the crust were deformed, making this the greatest area of vertical displacement ever measured. (Bolt)
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 happen about 20,000 times a year worldwide. They can destroy almost anything.In 2011, Japan had 9.1 magnitude earthquake, close to the highest magnitude of 9.2 in Alaska. They suffered tremendous damage from such a strong earthquake. The year before Haiti suffered from a 7.0 magnitude earthquake, still quite high compared to small tremors at magnitude 0-2. Japan recovered and rebuilt much faster than haiti did though. Haiti isn't even quite done recovering yet. The earthquakes had such different effects on the countries because of their economy, the condition of their people, and population rates.
The Pacific plate is moving northwest in relation to the North American plate, and it is believed that the total displacement along the fault since its formation more than 30 million years ago has been about 350 mi. Movement along the fault causes earthquakes; several thousand occur annually
In Heinrich von Kleist’s, The Earthquake in Chile, illustrates the story of star-crossed lovers brought together through a natural disaster. The description of the earthquake presents itself as a scene from hell. The relation between the destructiveness of the earthquake and the image of hell of apocalyptic literature presents the end of the world for the people of Chile. Kleist uses imagery to portray post earthquake Chile as the Garden Eden, the presence of a pomegranate tree symbolizes the start a new life and foreshadows the inevitable end for Josepha and Jeronimo. By introducing a pomegranate tree , Kleist frames the effects of the earthquake as an opportunity for and altruistic community. The symbolism of the pomegranate tree in the “Garden of Eden” symbolizes fertility for the rebirth of the Chilean community. Heinrich von Kleist’s, The Earthquake in Chile, presents the destructiveness of an earthquake as a transition from the image of hell to an opportunity to rebuild the community.
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).