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15 Cards in this Set
- Front
- Back
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Aftershock
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A series of small earthquakes that originate close to the focus of the large earthquake.
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body waves
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waves that travel from the focus of an earthquake through Earth
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earthquake
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shaking of Earths crust caused by a release of energy
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epicenter
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the point on Earths surface directly above the focus
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fault
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a break in the lithosphere along which movement has occurred
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focus
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the point at which the first movement occurs during an earthquake
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liquefaction
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occurs when loose soil temporarily takes on some of the properties of a liquid
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magnitude
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strength of an earthquake
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P waves
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the body waves known as compressional waves, primary waves. squeeze and stretch rock material as they pass through earth
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S waves
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Shear waves, secondary waves. cause particals of rock material to move at right angles
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Seismic Gap
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May be places where stress is building up.
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Seismogram
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Is placed on a drum attached to the base.
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Seismograph
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Detects and records waves produced by earthquakes that may have originated hundreds, even thousands, of kilometer away.
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Surface Waves
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Are earthquake waves that travel along Earth's surface.
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Tsunami
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A tsunami can travel very quickly across large expanses water.
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