Option D: Geophysical Hazards

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4 Terms

1
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Outline two associated secondary hazards associated with volcanic eruptions. [2+2]

  • Pyrocrastic flows: a super heated mixture of gas and tephra, from the volcano, that flow at speeds up to 700km/hour

  • Lahars: mudflows that occur when tephra mixes with water (eg. from rainfall) →destroy eveything in thei path

2
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Outline how the distance from the epicentre of an earthquake can determine the severity of two associated secondary hazards. [2+2]

3
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Outline two human triggers of earthquake events [2+2]

  • Rse

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