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Earthquake Terms

TermDefinition
Mantle rocky layer located under the crust. Composed of silicon, oxygen, magnesium, and calcium
surface wave seismic wave that moves rock particles in a backward, rolling motion and also in a side-to-side, swaying motion
seismograph instrument used to register seismic waves and record the time that each arrived
secondary wave seismic wave that moves rock particles at right angles to the direction of the wave
core solid inner most part of Earth's structure, made of solid iron-nickel
focus point below Earth’s surface where energy is first released in the form of seismic waves
Richter Scale scale that compares the magnitude of an earthquake recorded by seismographs.
mohorovicic discontinuity separates the crust and the upper mantle
seismic wave wave generated by an earthquake
primary wave seismic wave that causes rock particles to move back and forth in the same direction that the wave is traveling
epicenter point on Earth’s surface directly above the earthquake focus
lithosphere crust plus the rigid, upper mantle
Mercalli scale used to measure the strength of an earthquake based upon damage.
asthenosphere the part of upper mantle that is flowing
earthquake vibrations, or shaking, produced when rocks break along a fault
crust rigid, rocky outer surface of the Earth
Created by: Hudo The King
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