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30 Cards in this Set
- Front
- Back
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Vibrations of the earth caused by a rapid release of energy are....
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earthquakes
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Earthquakes are caused by....
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slippage of earth
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At what locations is slippage of the earth likely to occur?
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faults
convergent zones divergent zones transform boundaries |
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What famous/devastating US earthquake occurred in 1906?
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San Francisco
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What fault is responsible for many earthquakes in California?
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San Andreas
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Smaller earthquakes that follow a large earthquake are called....
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aftershocks
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Small earthquakes or rumblings that come before a major earthquake are called....
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foreshocks
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Devices that detect earthquakes are....
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seismographs
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Do seismographs predict when earthquakes will occur?
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No
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The graph printed by a seismograph is called a....
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seismogram
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The first type of waves to appear from an earthquake are __ waves.
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p
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P waves get their "letter" because they are ____ -___ waves.
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push-pull (or longitudinal waves)
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P waves vibrate to & fro in the _____ direction in which they travel and produce e___ and c___.
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same
expansions contractions |
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How many seismographs are needed to pinpoint where an earthquake occurs.
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Three
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The second type of waves to appear on a seismogram are....
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S waves
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Unlike p waves, S waves move back and forth, p_____ to the direction that the wave moves.
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perpendicular (90 degree angles)
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S waves get their "letter" because they are considered "s____" waves.
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shake
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The third type of waves to appear, that create the most movement on the seismograph, is the...
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Surface wave
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The name of the earthquake scale most recognized by the public is ....
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Richter scale
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The earthquake scale that measures energy release and preferred by scientists is the....
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Moment Magnitude scale
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The place on the earth's surface that is above where the earthquake occurs is the....
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epicenter
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If the earth moves while under the ocean, it can create a...
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tsunami
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The Richter scale is based on powers of 10, which means that a value of 6 is ___times more intense than a 4.
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100
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Because of gas & electric line breakage during earthquakes, ___ are common.
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fires
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Scale rates an earthquakes intensity in terms of the earthquakes effects at different locations on a scale of 1-12.
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Modified Mercalli Scale
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The place within the earth, along the fault line, where the earthquake originated.
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Focus
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The explaination for the release of energy stored in deformed rocks.
Force is applied to rocks, rocks bend, rock breaks, energy is released. |
Elastic Rebound effect
Elastic Rebound hypothesis |
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Describes the measurement of the amount of shaking based on the amount of damage.
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Intensity
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Describes the measurement of the seismic wave, or the amount of energy released by the earthquake.
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Magnitude
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The energy from an earthquake that spreads outward in all directions.
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Seismic wave
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