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EQ vocab

earthquake vocabulary

TermDefinition
Epicenter point on Earth’s surface directly above the earthquake focus
Focus point below Earth’s surface where energy is first released in the form of seismic waves
Primary Wave seismic wave that causes rock particles to move back and forth in the same direction that the wave is traveling
Secondary Wave seismic wave that moves rock particles at right angles to the direction of the wave
Seismic Wave wave generated by an earthquak
Seismo graph instrument used to register seismic waves and record the time that each arrived
Surface Wave seismic wave that moves rock particles in a backward, rolling motion and also in a side-to-side, swaying motion
Crust rigid, rocky outer surface of the Earth
Mantle rocky layer located under the crust. Composed of silicon, oxygen, magnesium, and calcium
Core solid inner most part of Earth's structure, made of solid iron-nickel
Lithosphere crust plus the rigid, upper mantle
Asthenosphere the part of upper mantle that is flowing
Mohorovicic Discontinuity separates the crust and the upper mantle
Earthquake vibrations, or shaking, produced when rocks break along a fault
Mercalli Scale scale used to measure the strength of an earthquake based upon damage.
Richter Scale scale that compares the magnitude of an earthquake recorded by seismographs.
Created by: marshbounds
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