Comprehensive Personal Emergency Plan

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[Writer Name] [Subject] [Date] Comprehensive Personal Emergency Plan Earthquake Section One introduction A natural disasters is when extreme events which cause great loss of life and or property and create severe disruption to human lives, such as an earth quick. Natural disasters are a part of life that takes place unexpectedly affecting people and their living environment. Floods, hurricanes, earthquakes and tornadoes can be devastating. Even more devastating are the consequences of not being fully prepared (Smith, 101-106). As a student and residence of IUB (Indiana University Bloomington) its better for us to understand how earthquakes occur, we have to go in depth and explore the fundamentals of this natural phenomenon. First off we must recognize the meaning of deformation and stress. Deformation is the change in shape or state of a material in response to an applied stress. To better understand rock deformation we must first explore the stresses. Stress is the action that causes strain or deformation. To cause strain in rocks, stress must be different in at least two directions, also known as differential stress. Here are three types of differential stress that occur: Compression stress, which squeezes rock; tensional stress, which stretches rock; and shear stress, which result in slippage and translation. Now that after 0clearly identified stress further important thing to understand is deformation. When a rock is subjected to increasing stress it passes through three successive stages of deformation. Elastic deformation is where the strain is reversible, like a rubber band, plastic deformation is where a material bends and stretches but does not lose cohesion, like clay or putty and finally brittle deformation where material breaks and loses cohesion, like broken glass. This deformation (brittle) is actually what generates earthquakes, and the
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