click below
click below
Normal Size Small Size show me how
Ch7 sec2
Earthquackes
Term | Definition |
---|---|
Fault | A huge crack in the Earth's crust at or below the surface, sides of which may show evidence or motions. |
Focus | The point where an Earthquake starts as rocks begin to slide past each other. |
Seismic Wave | A vibration that spreads out away from a focus a focus when an earthquake happens. |
Epicenter | The point on Earth's surface directly above the focus of an earthquake. |
Aftershock | shaking of Earth's crust after the initial shaking of an earthquake. |
Seismograph | a sensitive device that detects the shaking of Earth's crust during an earthquake. |
magnitude | The amount of energy released in an earthquake. |