Vocabulary for L.1-5
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| seismic waves | waves of energy that travel throughout the Earth
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| fault creep | the slow movement of rock on opposite sides of the fault
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| normal fault | a fault in which the hanging wall moves down in relation to the footwall
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| reverse fault | a fault in which the hanging wall moves up in relation to the footwall
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| strike-slip fault (lateral) | a fault in which two fault blocks move past each other horizontally
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| thrust fault | a reverse fault with a gently dipping fault structure (where the hanging wall comes up over the footwall)
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| epicenter | the point on the Earth's surface directly above an earthquake's focus
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| focus | the point inside the Earth where an earthquake begins
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| liquefaction | the process by which soil loses strength and acts as a liquid instead of a solid
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| Mercalli scale | a scale used to measure an earthquake's intensity based on eyewitness observations
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| P waves | the fastest seismic waves, which travel through solids, liquids, and gases.
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| S waves | the second fastest seismic waves, which travel only through solids
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| Richter Scale | a mathematical scale that measures the actual amount of seismic activity of an earthquake
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| seismograph | an instrument that measures and records earthquakes
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| surface waves | seismic waves that ravel only across the Earth's surface.
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| aftershocks | tremors that follow major earthquakes and can cause a lot of dame as well.
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| tsunami | a vary large ocean wave caused by an underwater earthquake or volcanic eruption
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| fissures | tears in the Earth's crust caused by the friction of a fault
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Created by:
Mrs. Sutherland
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