The ... is directly above the focus, where the earthquake meets the crust surface
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Card 8
Front
... are waves of energy
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Card 9
Front
A ... is lines of weakness running through the crust
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Card 10
Front
Seismic Waves: ... waves are fast-travelling, low frequency, compressional waves which vibrate in the direction which they travel
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Card 11
Front
Seismic Waves: ... waves are half the speed of P-waves and have a high frequency, They vibrate at right angles to the direction in which they travel
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Card 12
Front
Seismic Waves: ... waves are the slowest of the 3 waves, but also have a low frequency. Some have rolling movements that moves the surface vertically while others move the ground at right angles
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Card 13
Front
Surface Waves: ... waves move side to side
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Card 14
Front
Surface Waves: ... waves move in elliptical waves; a circular direction
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Card 15
Front
Earthquake formations: ... are lowland regions that form where the Earths tectonic plates move apart. They are created by the process of sea floor spreading, and by tectonic activity
