Hazards definitions flashcards

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Earthquake

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20 Terms

1

Earthquake

The shaking of the surface of the Earth, Resulting from the sudden release Of energy in the lithosphere that creates seismic waves

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2

Seismicity

The frequency, type and size of earthquakes experience over period of time

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3

Fault

A weakness within the lithosphere (Earth’s crust) (all earthquakes happen on a fault line)

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4
<p>Focus </p>

Focus

The point in the crust where the energy is released from in an earthquake

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5
<p>Epicentre </p>

Epicentre

The point on the Earth’s surface that closest to the focus of the earthquake

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6

Lithosphere

The crust and the rigid upper section of the manel

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7

Natural hazard

A naturally occurring physical event (geological, hydrological or climatological) that threatens both human life and property)

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8

Fatalism

The belief that events are predetermined and unavoidable, leading to resignation and acceptance of one's fate without attempting to change it.

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9

Distribution

The spatial coverage of a hazardous event (local, global)

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10

Frequency

How many times an event occurs in a specific area (The distribution of a hazard through time)

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11

The Ring of Fire

Area of plate boundaries where volcanic and seismic events take place very frequently.

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12

Risk

The exposure of people to a hazardous event

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13

Vulnerability

The potential for loss

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14

Landslide

The downward movement of soil and rock on a slope (e.g. Gorkha, Nepal 2015)

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15

Tropical storm

An intense low precious system that develops in the tropics

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16

Intra-plate earthquakes

Earthquakes which do not happen at plate margins (often linked to hot spots or old fault lines)

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17

Risk

The probability of a hazard happening creating a loss of lives and/or livelihoods

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18

Disaster

When a hazard has a significant impact on people

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19

Vulnerability

The risk of exposure to hazards combined with an inability to cope with those hazards.

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20

Resilience

The degree to which a population or environment can absorb a hazardous event and stay organised and functioning (a population or an environment’s ability to cope with stress and recover

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