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Earthquake Vocab
Term | Definition |
---|---|
focus | the point underground where rocks first begin to move. Seismic waves travel out from here |
tsunami | a water wave that is triggered by an earthquake, volcanic eruption, or landslide, can make water rise more than the height of a 20- story building |
fault | a fracture, or break, in Earth’s lithosphere, along with blocks of rock move past each other |
seismograph | an instrument that constantly records ground movement |
stress | the force exerted when an object presses on, pulls on, or pushes against another object |
earthquake | shaking of the ground caused by the sudden movement of large blocks of rock along a fault |
liquefaction | a process in which shaking of the ground causes soil to act like a liquid |
epicenter | the point on Earth’s surface directly above the focus |
seismic waves | earthquake energy travels as these; vibrations caused by earthquakes |
aftershock | a smaller earthquake that follows a more powerful earthquake in the same area |