Basic facts | Why Earthquakes happen | Seismic Waves | Scales | Things about earthquakes |
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What is constant movement of the earth's plates.
This causes earthquakes
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True
The first motion of an earthquake occurs at the focus.
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What is p-waves
The fastest moving waves
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What is small earthquake
A foreshock
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What is epicenter
The point on the surface nearest the earthquake
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What is the elastic rebound theory
This releases of stress during an earthquake
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Earthquake
Vibrations in Earth that are caused by the sudden movement of rock
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What is true
S-waves travel through solids only
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What is true
The Moment Magnitude scale is used to measure a large earthquake.
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Stored elastic energy in bent rock
The immediate energy source for earthquakes.
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What is a slip
The amount of ground displacement in a earthquake is called the _________ .
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Magnitude
The measure of the strength of an earthquake
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What is p-waves
Type of seismic waves can travel through solids, liquids and gases
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What is seismograph
An instrument that detects and measures earthquakes
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8.6
The strongest magnitude earthquake ever measured on the Richter scale
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What is yes
The ground always shakes during a earthquake
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What is Move to an open area free of buildings and obstacles.
In case of evacuation announcement
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What is shadow zone
The area where no direct seismic waves from a particular earthquake can be detected
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Indian Ocean English Canal The Ring of Fire Mid-Atlantic Ridge
This area is responsible for 90% of all earthquakes in the world and contains numerous faults:
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Along faults
Most earthquakes occur
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What is yes
The first earthquake is usually the most powerful
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What is epicenter
The location on the surface directly above the earthquake focus
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What is the speed and direction of seismic waves
The composition of Earth's interior effects
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What is Mercalli Scale
This scale is used to measure the intensity of an earthquake
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High winds
following is not associated with earthquake destruction
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