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When rocks break, they move along surfaces called faults. |
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An earthquake is the vibrations produced by the breaking of rock |
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Along a normal fault, rock above the fault surface moves downward in relation to rock below the fault surface. |
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If rock breaks from forces pushing form opposite directions, rock above a reserve fault surface forced up and over the rock below the faults surface. |
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At a strike- slip fault, rocks on either side of the fault are moving past each other without much upward or downward movement. |
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Where did the largest recent earthquake (over 4.5 on Richter scale)occur |
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Have any occurred in the world in the last hour? |
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How many earthquakes occur each year? |
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How many of them can actually be felt? |
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Where was the largest earthquake ever recorded? |
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Where was the world's most deadly earthquake? |
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