damaging waves figure 6.7 pg 170
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Prior to quake
After the quake
Figure 6.7 pg 170
Damaging wavesGreatest amount of surface displacement
usually
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Risk Map pg 183
High in silica
Low in silica
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Plates
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Continental crust
Oceanic crust
high temperature
lower temperature
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CompositeStrato
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100s of km in diameter
General Controls of VolcanoesType of magmaPlate Boundary Type
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1 km 3 ejected from Mt St Helens
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100s of meters in diameter
Eldfell, Iceland
convergance of Oceanic / Continentalplates
Pyroclastic Flow"Glowing Cloud"
Fluid lavas
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50 km3 of material
ejected
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boss
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b. Convergent Plate Boundaries1. Oceanic Continental boundaries2. Deep Ocean trench forms3. Subduction of Ocean plate beneath Continental plate
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