Impacts of Volcanic Activity (AQA A-Level Geography): Flashcards
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Practise the cards
10 cards from this deck
Primary volcanic effects
Primary volcanic effects
Immediate impacts from ejected material
Secondary volcanic effects
Secondary volcanic effects
Indirect consequences after eruption
VEI scale
VEI scale
0-8 logarithmic scale, measures erupted volume
Tephra
Tephra
Solid material from bombs to ash ejected in eruption
Pyroclastic flows
Pyroclastic flows
Hot (800°C+), fast (700 km/h) gas & tephra flows
Lahars
Lahars
Volcanic mudflows: ash + water
Lake Nyos disaster (1986)
Lake Nyos disaster (1986)
CO2 emissions killed 1,700 people in Cameroon
Krakatoa tsunami (1883)
Krakatoa tsunami (1883)
36,000 killed by waves from eruption
Viscous lava effect
Viscous lava effect
Traps gases, causes explosive eruptions
Volcano prediction signs
Volcano prediction signs
Gas release, lava rise, land bulge, earthquakes