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KY Earthquake
Earthquake
Question | Answer |
---|---|
earthquake | Vibrations produced when rocks break along a fault. |
epicenter | Point on Earth's surface directly above an earthquake's focus. |
fault | Surface along which rocks move when they pass their elastic limit and break. |
focus | In an earthquake, the point below earth's surface where energy is released in the form of seismic waves. |
liquefaction | Occurs when wet soil acts more like a liquid during an earthquake. |
magnitude | Measure of the energy released during an earthquake. |
normal fault | Break in rock caused by tension forces, where rock above the fault surface moves down relative to the rock below the fault surface. |
primary wave | Seismic wave that moves rock particles back-and-forth in the same direction that the wave travels. |
reverse fault | Break in rock caused by compressive forces, where rock above the fault surface moves upward relative to the rock below the fault surface. |
secondary wave | Seismic wave that moves rock particles at right angles to the direction of the wave. |
seismic wave | Wave generated by an earthquake. |
seismograph | Instrument used to register earthquake waves and record the time that each arrived. |
strike-slip fault | Break in rock caused by shear forces, where rocks move past each other without much vertical movement. |
surface wave | Seismic wave that moves rock particles up-and-down in a backward rolling motion and side-to-side in a swaying motion. |
tsunami | Seismic sea wave that begins over an earthquake focus and can be highly destructive when it crashes on shore. |