Earthquake Notes
____________________ are natural vibrations of the ground caused by ___________________ along
_____________________ ____________________ in Earth’s Crust
 Caused by ____________________ slipping along ______________________
______________________
 Can happen along any type of _______________________ ________________________
A _____________________ is a fracture on/in the Earht’s crust that occurs when ____________________ is
applied too quickly.
Area where _____________________ occur
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____________________ ____________________ occur as a result of compression
 ____________________ ____________________ - the upper part of a fault
 ____________________ - the lower part of a fault
____________________ ____________________ occur as a result of tension
 2 pieces of crust are ___________________ apart.
____________________ ____________________ ____________________ occur as a result of shear stress
 2 pieces of ____________________ are pulled passed each other.
 ____________________ ____________________ ____________________ (San Francisco)
The _____________________ is the point where an earthquake
originates.
The ____________________ is the point on Earht’s surface directly
ABOVE the focus.
The study of earth quake waves is called ____________________.
 The instrument for measuring the ____________________ is
called a _____________________ or ____________________
The ____________________ of the ground during an earthquake are
called ______________________ _____________________
 ____________________ ____________________ - pull rocks in the
SAME direction.
o Can move through solids and liquids
 _____________________ _____________________ - causes rocks to
move at RIGHT angles.
o Can ONLY move through solids
 ____________________ ____________________ - move in TWO
directions. Cause the MOST DAMAGE!!
Time Travel Curves
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___ _________ are always detected first (MOVE FASTER)
With increasing distance there is a greater difference between
the arrival time of _____ and _____ waves
The difference in arrival time between __________ and
__________ waves can determine HOW FAR away the
earthquake is
Earthquake Magnitude
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The ____________________ _____________________
measures the largest seismic waves generated in an
____________________.
o The _____________________ genereated by a 5
are 10% larger than the waves generated by a 3.
Earthquake Magnitude
 The amount of
____________________
released from an earthquake is
based on the number
__________.
o A 3 releases 32X the
amount of energy as a
2.
Other Hazards associated with
Earthquakes
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