Chapter14rev - Chapter 14 review Christian Smith 1 An...

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Chapter 14- review Christian Smith 1. An earthquake is the vibration of Earth produced by the rapid release of energy, usually along a fault. A fault is a large fracture along which there is or has been movement. 2. A fault is a large fracture along which there is movement. When movement occurs, the zone within Earth where rock displacement occurs is termed the focus. 3. H. F. Reid, a professor at Johns Hopkins University, based his elastic rebound idea on studies of the 1906 San Francisco earthquake. 4. Reid concluded that the quake was due to excess, elastic strain energy being suddenly released as the highly overstrained rocks snapped back to a state of much lower strain. Cool lithospheric rocks have elastic limits large enough to support earthquake-causing, elastic strains. 5. Creep movements should reduce the likelihood of an earthquake by reducing the level of strain accumulated in the fault-zone rocks. A fault without creep may reflect two, fundamentally different conditions. First, the stresses may be too small to move the blocks and there is no accumulation of elastic strain; in this case, the fault is clearly inactive.
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  • Spring '13
  • NguyenVanVuong
  • surface waves, Seismic sea waves

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