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6 Cards in this Set

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earthquake

Shaking of the earth's crust

seismograph
Instrument that detects and records earthquake waves.

focus
Point inside the earth where rock first moves, starting an earthquake.

epicenter
Point on the earth's surface directly over the focus of an earthquake.

Richter scale
Scale used to measure the strength of an earthquake.

tsunami
Large sea wave caused by vibrations of the earth.