Earthquakes

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Last updated 6:30 PM on 4/20/26
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14 Terms

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Plate boundary

edge where tectonic plates meet

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Transform boundary

plates slide past each other

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Convergent boundary

plates collide

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Focus (hypocenter)

origin of earthquake underground

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Epicenter

point above focus on surface

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Seismic waves

energy waves from earthquakes

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P-wave

fastest compressional wave

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S-wave

slower shear wave, cannot travel through liquids

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Seismograph

instrument that records seismic waves

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Seismogram

recorded seismic data

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Triangulation

method to locate epicenter using 3 stations

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Magnitude

measure of earthquake energy

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Richter scale

measures shaking intensity

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Moment magnitude

measures total energy released