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14 Cards in this Set
- Front
- Back
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A ___________ is a fracture in rock where rock pieces move in the same direction as the break.
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Fault
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What causes earthquakes?
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The sudden release of slowly built up strain.
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One earthquake can be responsible for thousands of deaths and can destroy an entire city. This means that:
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Initial earthquake vibrations usually last for several hours.
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The point inside the Earth where rupture first happens to cause an earthquake.
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Focus
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What has the information of seismic data revealed about determining an earthquakes epicenter?
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Epicenters are located based on known travel times of P waves and S waves to seismic stations.
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Seismologists pinpoint the exact location of an earthquake by:
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Interpreting seismograms from at least 3 stations.
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Earthquake intensity is a measure of:
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The effects of the earthquake on the earth's surface.
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The Richter Scale is a measure of:
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the amplitude of seismic waves.
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The amplitude of seismic waves created by an earthquake with a Richter size 9.0 is how many times greater than a 7.0 earthquake?
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100
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2 different cities get an earthquake with a size of 5.5 on the Richter Scale. However, the Modified Mercalli Intensity scale says one was rated V while the other was 6. Why?
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One city was built on bedrock. The other on loose sediments.
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A tsunami is a great sea wave produced by:
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A submarine earthquake or volcanic eruption.
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Walking to school one day you feel the ground move in an up-down rolling motion. You are experiencing a type of earthquake wave known as:
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Surface waves
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What kind of seismic waves can travel ONLY through solids?
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Compressional waves
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If you were planning to develop land along an active fault zone, which type of development would be LEAST affected by the geological hazards of the site?
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Parkland for a golf course.
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