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Impacts of earthquake hazards
Effects of earthquake Essay
Impacts of earthquake hazards
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Have you ever wondered just how powerful an earthquake can be? How much destruction it can cause? Well right here is where you want to be. Earthquakes are known for how powerful and destructive they can be when it comes to “bringing the house down”. Even though this powerful natural hazard can be disastrous or even catastrophic, you can learn more about them so that you’re more aware and prepared of what to do in case you are put into that situation.
Lets start off with the consequences of an earthquake. The consequences depend on a combination of factors like the magnitude, depth, distance from a populated area, the nature of local earth materials, and also the way structures like houses, buildings, roads, railroads, utility lines, and pipelines are built. (Natural Hazards, Second Edition) Earthquake losses, like those of other disasters, tend to cause more financial losses in industrialized countries and more injuries and deaths in undeveloped countries. Earthquakes can also cause secondary disasters like tsunamis, a natural disaster where a series of waves of very great length and period, are usually caused by large earthquakes under or near oceans that are close to the edges of tectonic plates. The waves created by a tsunami can travel long distances and increase their height as they hit shallow water. Tsunamis are able to create great damage and destruction far away from their source. (American Public Health Association, 2005)
To help prepare buildings for earthquakes in certain regions, they estimate the probability of how often an earthquake will occur in that area. Other factors include: the shaking intensity that is produced by the earthquake (which can also be expressed as the peak acceleration), how frequent the s...
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...citizens before the earthquake happens. Why we cannot find a way to predict when and where an earthquake will happen is because there are no obvious signs that show when an earthquake is about to happen until it’s too late. Vibrations can be detected just before an earthquake occurs, but this doesn't give us enough time to be able to have people escape the disaster.
It’s hard for scientists to be able to study the many tectonic plates that are constantly interacting with each other deep under the earths surface. Their interactions are really complex which makes it really difficult to study them and understand what’s going on. Scientists at USGS and other organisations are working hard to develop methods where we will be able to predict earthquakes. Hopefully, scientists will eventually find a way to predict earthquakes specifically where it could save many lives.
Problem Statement: Earthquakes are a natual part of the environment. They do,however,cause devistating effect on the environment. Since Earthquakes can not be avoided, maybe there is a way to determine when they are going to occur so precautions can be taken to get people to safety and protect as much of
On February 4th 1975 in Haicheng China there was a magnitude 7.5 earthquake. Over a period of months there were changes in elevation in land, ground water and unusual animal behavior which are all precursors to an earthquake. Days before the 7.5 magnitude earthquake there were foreshocks that triggered an eviction warning that effectively saved over 150,000 lives or injuries. This is a pro as this forecast saved thousands of lives and had the people of this area (knowing this was a place of seismic activity) took precautions, like that of earthquake resistant buildings, evacuation points, preparing disaster supplies among other preparations the following may not have happened or would have been less of a disaster.
Earthquakes in California are certainly not a surprise. What is a surprise is their unpredictability and randomness. Geologists say there is roughly a 50 percent chance that a magnitude 8 or more quake will hit the Los Angeles area sometime over the next 30 years. And, over the past twenty years, the Los Angeles area has witnessed several earthquakes, and in particular, two that were quite devastating; the 1971 San Fernando earthquake, and the January 17, 1994, Northridge Earthquake. Given the certainty that earthquakes will occur, they still seem to come as a surprise, and leave many communities unprepared to deal with their aftermath.
Hazards pose risk to everyone. Our acceptance of the risks associated with hazards dictates where and how we live. As humans, we accept a certain amount of risk when choosing to live our daily lives. From time to time, a hazard becomes an emergent situation. Tornadoes in the Midwest, hurricanes along the Gulf Coast or earthquakes in California are all hazards that residents in those regions accept and live with. This paper will examine one hazard that caused a disaster requiring a response from emergency management personnel. Specifically, the hazard more closely examined here is an earthquake. With the recent twenty year anniversary covered by many media outlets, the January 17, 1994, Northridge, California earthquake to date is the most expensive earthquake in American history.
The Physical and Human Factors Which Affect the Location and the Impact of the Earthquake Hazard
benchmark for the future, and integrated investigation into the effects of earthquakes in the U.S.
This leads to formulating certain survival procedures, researching new technology and preparing and for an earthquake and volcanic eruptions. To overcome the effects of earthquakes, scientists and engineers have designed earthquake resistant infrastructure. This was created because common infrastructures fail in earthquakes as there are heavy and can 't stand seismic waves. The major cause of death during earthquakes is being killed by a falling building. However, in earthquake resistant building the main concept is to make the building as rigid, strong and out of the lightest material possible so if it does fall individuals have a possibility of surviving. At the bottom of earthquake resistant building, there would be some sort of shock absorber, so it can absorb the seismic waves reducing the impact. Then, the building will incorporate a sheer core and sheer walls, to reduce the rocking movements of an earthquake. Along with this, walls will have two steam beams for added security. In developing countries, a similar type of plan is used but the building is made out of more cheaper and everyday objects. Another defence systems humans use to adapt to earthquakes and volcanoes is monitoring and warning systems. Monitoring and warning systems are usually controlled by local or national governments. In earthquake situations, sensors (which are distributed in the region prone to earthquakes) send information to the alert centre when a seismic wave is detected, there the information is investigated. Afterwards, the information from the alert centre is immediately transmitted to the individuals of the region warning them about the expected intensity and arrival time of earthquake by text message or call. After that, it is advised that individuals turn off all electrical appliances and follow their local earthquake
The New Madrid Fault is hidden under 100-200ft thick layers of river deposits. Traces of the fault in the layers erode quickly and are often covered by new deposits, making it very hard to study the fault. Therefore, most of the knowledge we have of the New Madrid Fault comes from seismograph recordings of the frequent and small earthquakes. However, it is still debated as to when the next major earthquake will happen in the area. According to statistical analysis done by paleoseismologists, the possibility of having an earthquake of 7.5-8.0 on the Richter scale is roughly
Picture this you were just getting up or sleeping, on September, 19, 1985 at 7:17 AM and then the ground started to shake! “IT’S AN EARTHQUAKE”, you would yell and hopefully jump out of bed and go outside so you don't get smashed by pieces of your house. The cause of this earthquake was two plates that slide past each other. This giant earthquake killed thousands and destroyed thousands of buildings in Mexico city also this earthquake spread a long ways. There was a earthquake 4 months prior to the real earthquake so this could be an effect of this quake. As a result this caused a major natural disaster beyond belief. The effects of this earthquake was that it killed thousands, cost billions, and destroyed thousands of buildings.
Designing an Earthquake-Proof Home Approximately 8,000 people each year are killed by earthquakes. Around 1, 300,000 earthquakes occur per year (two per day) with magnitudes of 2.9 or lower. Eighty percent of the earth’s largest earthquakes occur near the “Ring of Fire” which is a region in the Pacific Ocean where many tectonic plates meet. The average earthquake lasts around 60 seconds.
The term earthquake comes from the Greek term for “shaking.” An earthquake is a visible rip across the Earth’s surface due to a release of energy and stored stress in the Earth’s crust and causes seismic waves. Earthquakes have been around since the time of the earliest civilizations. Earthquakes used to be compared to the “unrest of spiritual beings.” Specifically, Aristotle and the Ancient Greeks stated that earthquakes were the result of the “underground winds”. The earliest earthquakes were recorded by seismometers which calculate the waves generated by each earthquake. The original seismometer was the Wood – Anderson seismometer. When an earthquake would occur a structure would dangle and reflect light on an image. The image “drawn” by the light reflected the amount of seismic waves caused by the earthquake. The second seismometer came in the 1930’s from Charles Richter who used a logarithm to determine the seismic waves. The current magnitude scale that appears in the media came in the 1960’s from Keitti Aki. This model takes the overall seismic movement through scientific analysis. These models have helped scientists and geologists further develop the impact of earthquakes throughout history and some of these methods are still used today (Hough 1).
A lot of people die from the falling rubble of collapsed buildings when earthquakes occur, not the actual earthquakes themselves. Technology does exist to stop earthquake destroying cities. If technology likes this exists why do earthquakes still effect people the way they do? The problem is that the expenses are still very high. And what about the buildings that already exist? They will have to be rebuilt from scratch, so the engineering used can be put on place. There are two main ways that you can strengthen a building against earthquakes. You can make the building stronger, so the quakes don’t rock the
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 result in injuries and people getting killed, wildlife getting disrupted as well as humans. An earthquake can affect the earth as it’s easier to let the lava come out of the earth. Tsunamis- Can cause financial problems such as home loss, job loss which will then result in being homeless, loss of crops and food supplies which causes a lot of harm to us ‘humans’. A tsunami is a series of waves that send surges of water that can travel thousands of miles.
Authorities have attempted to implement codes or regulations, but that has proved to be very difficult tasks becasue there are many variables that effect the dynamic response of buildings. One way to try to avoid disaster is to evaluate seismic risk is to look at a buildings hazards, exposure, vulnerability, and location. Hazards are, for example, landslides ad soil type. Exposure is a building's occupancy and function. Vulnerability is the expected performance of a building's system, and location is how often earthquakes occur in the area. (Lagorio)
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).