Earthquakes in Australia Australia is a very lucky country that suffers very few earthquakes or volcanic eruptions. Earthquakes are caused by converging plates (usually subducting)‚ and there a 4 different types of waves in two categories; firstly there is Body waves which are broken into primary and secondary waves (these travel through the earth) Surface waves travel through only the crust and are called Love and Rayleigh. These Waves (the earthquakes) are measured by a seismograph/ a device that
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separated or slipped from the metaphysis.1 The germinal cells of the growth plate remain with the epiphysis‚ and the calcified layer remains with the metaphysis. (Physeal Injuries) Type I fractures occur most commonly in the distal tibia and fibula‚1 but are uncommon in the wrist‚ accounting for only 8.5% of all Salter-Harris fractures. (Ped.Distal) Upon examination‚ and athlete will be point tender over the growth plate which warrants a referral to an orthopedist.1 On an x-ray‚ there is soft tissue
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Jaesung Lee Geography 1 Professor Thomas Orf Chapter 14 Questions 1) The first evidence Wegner was able to find was the remarkable number of close affinities of geologic features on both sides of the Atlantic Ocean. He found the continental margins of the subequatorial portions of Africa and South America fit together with jigsaw-on-like precision. He also determined that the petrologic records on both sides of the Atlantic show many distributions- such as ancient coal deposits-that would
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circulation. This is called plate tectonics. 4. The origin of earth’s magnetic field is a result of molten metal in the outer core that circulates around the inner core like a giant dynamo. Magnetism of the lithosphere supports the model of plate tectonics through the development of new oceanic crust that formed volcanism at the ridge crest in the prevailing polarity. This new crust was split apart and then moved in opposite directions. This explains new lithosphere at mid oceanic plate margins. 5. Gravity
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Earthquake activity in Pakistan is mainly concentrated in the north and western sections of the country‚ along the boundary of the Indian plate and the Iranian and Afghan micro-plates. The Chaman Fault runs along Pakistan’s western frontier with Afghanistan from Kalat‚ in the northern Makran range‚ past Quetta and then on to Kabul‚ Afghanistan. A fault also runs along the Makran coast and is believed to be of the same nature as the West Coast fault along the coast of Maharashtra‚ India. An active
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earthquakes to plate tectonics and faults in Los Angeles? What are some historical disasters associated with earthquakes? What are the hazards associated with earthquakes? What is the potential for future earthquakes in the Los Angeles area? Earthquakes are started at the Earth’s crust. Our planet is made up of different plates which float on a layer of molten material or magma much like potato chips would float on top of a bowl of water. Scientists believe there could be as many as 12 plates that make
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Speech The diverging plates below us are moving everyday; reshaping our world‚ slowly‚ but surely. These divergent boundaries are being studied around the world and they teach us about our evolved world‚ and its continuing evolution today. There are two types of divergent boundaries‚ the oceanic and the continental. These occur where their names have defined‚ within the oceanic crust and the continental crust. Both begin at the movement of the convection currents‚ which push plates up and away from
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A look at the Inner Earth Studying the earth’s interior can help us to understand earthquakes‚ volcanoes‚ plate tectonics and more about the inner earth’s natural processes. In general the earth’s interior has been sorted by Gravity. Heavier elements like iron tend to sink toward the center or core of the earth. Lighter materials‚ the silicates‚ oxygen compounds and water have risen to become part of the crust. This action has created distinct layers within the earth and is still in process today
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winds through all major ocean basin like the seams on a baseball. Ridges vary in width from 600 miles to 2500 miles. The mid-ocean ridge represents an area where‚ lithospheric plates move apart and new crust is created by magma pushing up from the mantle . Also‚ the mid-ocean ridge system is an example of a divergent plate boundary. 4.) Briefly describe the process of continental rifting. Where is it occurring today? As crust is pulled apart‚ rifts are formed and eventually become large enough
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example of a regular volcanic eruption caused by a ‘Hawaiian’ Volcano is Kīlauea which has been continuously erupting since January 1983‚ and has causes no loss of life. Looking at the proprieties of the magma explains why eruptions along subduction plate boundaries product more ‘hazardous’ eruptions‚ and this is one of the reasons that a volcano becomes more hazards because the more viscous a material is the more pressure build up will occur within the volcano‚ causing more explosive eruptions. Explosive
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