Question Answer
This type of fault is created by compressional forces and causes rocks to move upward. Reverse fault
The point below earth's surface where earthquakes originate. Focus
The paper record of a seismic event. seismogram
The point on earth's surface directly above the earthquakes focus. epicenter
Describes the strength of an earthquake based on the height of the waves on a seismogram. Measured in decimals. Richter Scale
Seismic wave that moves particles back and forth in same direction the wave travels. Primary wave
The measure of the energy released during an earthquake. magnitude
Vibrations produced when rocks break. earthquake
Instrument used to measure an earthquake and record the arrival times of P and S waves. seismograph
This type of fault is created by tension forces and causes the rock to move downward. normal fault
Weak places in earth's crust where rocks break because they have reached their elastic limit. faults
Faults created by shear forces that cause rocks to slide past one another. strike-slip fault
The waves generated by an earthquake are called _____ waves. seismic
The seismic wave that moves rock at right angles to the direction of the wave. secondary wave
The seismic wave that moves rock up and down, and side to side in a swaying motion. surface wave
Measures the intensity and damage that an earthquake caused. It is measured in roman numerals from I to VII. Mercalli Scale
Occurs during an earthquake when wet soil behaves more like a liquid. liquifcation
Seismic sea wave that begins over an earthquake focus that occurs in oceanic crust. tsunami
Primary waves travel the _____ and arrive at the seismograph station _____. fastest; first
Secondary waves travel _____ and arrive at the seismograph station ______. slower; second
Surface waves travel _____ and are the most _____. slowest; destructive

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