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| When rocks break they move along surfaces called faults |
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| Is the vibrations produced by breaking rock |
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| rock above fault surface moves downward in relation to rock below fault |
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| surface is forced up and over the rock |
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| rocks on either side of the fault are moving past each other |
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| pressure wave generated by an earthquake |
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| point underground where earthquake begins |
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| point on earth's surface right above the focus |
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| slowest, travel on surface, most destructive |
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| instrument used to measure earthquakes |
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| measurement of earthquake magnitude |
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| when ground acts like a liquid during an earthquake |
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| large wave caused by earthquake |
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| where did the largest earthquake occur? |
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| how many earthquakes occur each year? |
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| how many of them could be felt |
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| what percent does that represent |
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| largest earthquake ever recorded |
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