geography terms

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17 Terms

1

aftershock

A smaller earthquake following the main shock of a larger earthquake

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2

crust

The outermost solid layer of the earth

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3

disaster

Earthquake becomes this after significant loss

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4

earthquake

A sudden violent shake of ground causing destruction as a result of movement in earth’s crust

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5

epicentre

Point on surface directly above earthquake’s focus

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6
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7

faults

A fracture in rock formation along there has been movement of the rocks on either side of fracture

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8

focus

Place of origin of an earthquake

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9

hazard

Danger or risk

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10

landslide

Collapse of mass or earth from mountain or cliff

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11

liquefaction

Shaking earth reduces strength of soil forcing liquid to rise to top

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12

magnitude

size of earthquake measure be energy released

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13

plate boundary

where two tectonic plates meet

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14

ring of fire

zone of activity surrounds Pacific Ocean and plate

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15

Richter scale

way to measure earthquakes is logarithmic scale so that a difference of one has a roughly 30-fold different in size

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16

seismograph

instrument that measures earthquake it measures size and duration also known as seismometer

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17

tsunami

long high sea wave that can be caused by earthquakes

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