Epicentre - The point on the ground surface directly above the focus of an earthquake, Focus - The real 'centre' of an earthquake, where pressure is released inside the crust., Seismic waves - Waves of energy given out in an earthquake; it shakes everything, Seismometer - An instrument for recording vibrations during an earthquake, Earthquake - The shaking of the Earth's crust caused by rock movement., Magnitude - How much energy an earthquake gives out., Richter scale - A scale measuring the energy given out in an earthquake., Tsunami - Giant waves caused by earthquakes in the ocean floor., Aftershocks - Smaller earthquakes after the main earthquake.,

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