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seismogram

A tracing of earthquake motion that is created by a seismograph

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fault

A break in the Earth's crust along which blocks of the crust slide relative to one another

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Tectonic plates

Giant pieces of the Earth's thin, outermost layer that move around on top of a layer of plastic rock

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seismologists

Scientists who study earthquakes

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earthquake

Shaking of the ground

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S wave (shear wave/secondary wave)

a seismic wave that causes particles of rock to move in a side-to-side direction

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P wave ( pressure wave/ primary wave)

A seismic wave that causes particles of rock to move in a back-and-forth direction

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Seismic wave

A wave of energy that travels through the Earth, away from an earthquake in all directions

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Elastic rebound

the sudden return of elastically deformed rock to its undeformed shape

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seismology

The study of earthquakes

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earthquakes can be devastating. they can ruin peoples lives and tear cities apart

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One other way earthquakes are fromed is s and p waves.

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Earthquakes are formed by convergent boundaries pressing against each