EARTHQUAKES Introduction and Terminology • Vibrations in the earth’s crust that occur when strain in the crust is suddenly released by displacement along a fault line • Focus = point at which an earthquake originates inside the earth. May be many km below surface • Epicentre = the point on the earth’s surface directly above the focus. Strongest shock normally felt here. Most damage usually occurs here. • Seismology = the study of earthquakes – from Greek – seio – to shake
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2010 Chile earthquake From Wikipedia‚ the free encyclopedia For other earthquakes in and about Chile during 2010‚ see List of earthquakes in Chile occurring in 2010. 2010 Chile earthquake Epicenter of the 2010 Chile earthquake Date 27 February 2010[1] Origin time 03:34 CST (UTC-03:00) Magnitude 8.8 Mw Depth 35 kilometres (22 mi)[2] or 30.1 kilometres (19 mi)[1] Epicenter 35.909°S 72.733°WCoordinates: 35.909°S 72.733°W[2] or 36.290°S 73.239°W[1] Countries or regions Chile Max. intensity
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In May 2008‚ a major earthquake hit Sichuan in the south west of China‚ it was estimated that around 69 000 to 80 000 people were killed and buildings collapsed with people in them information from an OCR science booklet‚ a news sheet. In my case study‚ I will be writing about Should we spend more money on predicting for an earthquake than on preparing a town for an earthquake I will do this by discussing different point of views of people if they agree or disagree with the statement above and use
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Alaska Earthquake 1964 Have you ever experienced an earthquake? Perhaps you have felt a small tremor or a large one. Whatever the case‚ you are not alone. Many people have experienced an earthquake at some point in their lives. It is an interesting experience and hard to forget. It can also be frightening as well‚ especially if you are caught off guard. Imagine going about your daily life when all of a sudden the ground starts to shake. Things fall and buildings collapse. What goes on in one ’s
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Managing the earthquake hazard Homework 07/03/15 Mitigation: Modify the event 1. How realistic is the control of the physical earthquake event? Control of the earthquake event itself and physical variables such as the location of the epicentre‚ depth of the focus‚ foundation material ie rock type‚ duration of shaking and time of day is not a realistic form of management. Earthquakes caused by humans on the other hand such as those resulting from dam destruction can be managed by considering
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THE RISK OF EARTHQUAKES FROM HYDRAULIC FRACTURING IN THE UK – KEY STAKEHOLDERS PERCERPTION 1.0 Background On the 1st April 2011‚ a magnitude 2.3M earthquake was recorded near the town of Blackpool‚ UK and this was followed on the 27th May 2011 by a second seismic occurrence of measuring 1.5 on Richter scale. These two events occurred close to Preese Hall drilling site‚ where Caudrilla Resources was extracting gas from a shale deposit using a new method called Hydraulic Fracturing‚ often referred
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What patterns to you see in the distribution of earthquakes across the continental United States? In researching the earthquake patterns across the United States. I noticed that a majority of the earthquakes are located along the western shorelines of California and some small amounts of seismic activities in the lower parts of the south east territories of the United States. These earthquakes occur along the Pacific coast and continue southward along the Pacific coast and North along the Pacific
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Why are earthquake impacts different in LEDCs and MEDCs? Any disaster either caused by humans or Mother Nature will make an impact but this depends where it hits. Obviously‚ if a disaster‚ or an earthquake in this case occurs somewhere densely populated rather an isolated area it will have a greater impact as life could be lost‚ buildings destroyed and as a result‚ high prices to pay. We will be looking at the impacts of earthquakes in Lower Economically Developed Countries and More Economically
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The Kobe earthquake (also known as the Great Hanshin earthquake‚ Hanshin meaning Osaka-Kobe) was a tragic disaster on several levels. The earthquake lasted just twenty seconds but caused so much damage‚ trauma and of course‚ loss. The focus of the earthquake was 16km beneath the epicentre‚ 20km from the city of Kobe. Japan‚ ironically‚ was named the “most earthquake proof country” before this disaster occurred. The earthquake measured 7.2 on the Richter scale and many more died from the fires that
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which approach the country. Earthquake An earthquake (also known as a quake‚ tremor or temblor) is the result of a sudden release of energy in the Earth’s crust that creates seismic waves. The seismicity‚ seismism or seismic activity of an area refers to the frequency‚ type and size of earthquakes experienced over a period of time. Earthquakes are measured using observations from seismometers. The moment magnitude is the most common scale on which earthquakes larger than approximately 5
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