1. Fault: A huge crack in the crust,at or below the surface, the sides of which may show evidence of motion.
There is a fault in San Francisco.
2.Focus: The point where an earthquake start, where rocks begin to slide past each other.
The focus shows where an earthquake take place.
3. Seismic Waves: A vibration that spreads out away from a focus when an earthquake happens.
The vibration of the crust is the seismic wave.
4.Epicenter: The point on Earth´s surface directly above the focus.
The epicenter distance is calculate by seismic magnitude.
5.Aftershock: The shaking of the crust after the initial shaking of an earthquake.
Aftershock continue the damage of an earthquake.
6. Seismograph: A sensitive device that detecs the shaking of the crust.
The scientist use seismograph to see if there is a earthquake.
7. Magnitude: The amount of energy released by an earthquake.
The wave on a seismograph is a measure of the magnitude of an earthquake.
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