Earthquakes and Seismic Waves Earthquake-is violent shaking of Earth’s crust Focus-exact point within the crust where the fist movement occurs Epicenter-point on Earth’s crust directly above the focus Types of Seismic Waves P Wave Primary-1st Fastest Accordion-in and out S Wave Secondary Snake-like Can’t travel through liquid Surface Wave-roll through the top of the crust creating the most damage Measuring Earthquakes Mercalli scale -measures damage The Richter
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Great Sichuan Earthquake. It was a once-in-a-year strong earthquake registering a magnitude of 7.8 measured in the Richter scale. The province where the earthquake took place‚ Sichuan‚ is in western China and its capital is named Chengdu. It is surrounded by the Sichuan Basin. In the Great Sichuan earthquake‚ the epicenter was in Wenchuan County‚ Ngawa Tibetan and Qiang Autonomous Prefecture‚ which is 80 km north-west of Chengdu; and its depth was 19 km. On May 12‚ 2008‚ the earthquake occurred at
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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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surface shown on it. We can also express this relationship as a ratio of distances between two points on the map and the corresponding distance between the same two points on the ground. 17 Practical Work in Geography There are at least three ways in which this relationship can be expressed. These are: 1. Statement of Scale 2. Representative Fraction (R. F.) 3. Graphical Scale Each of these methods of scale has advantages and limitations. But before taking up these issues‚ let us understand
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faults lead to be a lot more destruction. Earthquakes are a trembling or shaking of the ground caused by a sudden release of energy stored in rocks beneath earths surface. Earthquakes appear all over the planet‚ and there are many different sizes. Some earthquakes destroy entire cities while others only shake the ground for a moment. Faults are one of the causes of earthquakes‚ which I will tell about soon as well as the hazards and benefits they give. Earthquakes can be caused in many ways‚ some even
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in Finland; a scientist in Holland; an anti-nuclear protester in Australia; independent physicists in the United States; a grandmother in Canada‚ and countless others. Unlike the protests of the 1960s the objections to HAARP have been registered using the tools of the 1990s. From the Internet‚ fax machines‚ syndicated talk radio and a number of alternative print mediums the word is getting out and people are waking up to this new intrusion by an over zealous United States government. The research
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F Monday 9 June 2014 – Morning GCSE MATHEMATICS A A501/01 Unit A (Foundation Tier) * 1 2 6 8 1 0 0 9 8 0 * Candidates answer on the Question Paper. Duration: 1 hour OCR supplied materials: None Other materials required: • Scientific or graphical calculator • Geometrical instruments • Tracing paper (optional) * A 5 0 1 0 1 * INSTRUCTIONS TO CANDIDATES • • • • • • • Write your name‚ centre number and candidate number in the boxes above. Please write clearly and in capital letters. Use
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with Sources Richter scale and examples My topic for our research paper is going to be about the Richter scale; what it is and how it is used in the real world. Sources: Title: Richter scale. Columbia Electronic Encyclopedia‚ 6th Edition‚ Database: Literary Reference Center HTML Full Text Richter scale ListenSelect: Richter scale (rĭk′tər)‚ measure of the magnitude of seismic waves from an earthquake. Devised in 1935 by the American seismologist Charles F. Richter (1900–1985) and
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question or part question. For Examiner’s Use The total number of marks for this paper is 104. Electronic calculators should be used. If the degree of accuracy is not specified in the question‚ and if the answer is not exact‚ give the answer to three significant figures. Given answers in degrees to one decimal place. For π ‚ use either your calculator value or 3.142. This document consists of 11 printed pages and 1 blank page. IB06 06_0580_03/4RP UCLES 2006 [Turn over 2 1 y For Examiner’s
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the natural disaster called earthquakes. There has been developed a new technique to prepare the human race for earthquakes. In this essay‚ the possibility of getting to know when an earthquake is going to happen is going to be discussed. How is science going to be able to create a better world‚ if there’s a natural phenomenon that can’t be changed? Plate tectonics-Wikipedia‚ the free encyclopedia http://en.wikipedia.org/wiki/File:Plates_tect2_en.svg Earthquakes are produced by the sudden
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