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Earthquakes
Earthquake terms
12
Science
6th Grade
02/14/2012

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Term
Focus
Definition
a point along a fault at which the first motion of an earthquake occurs
Term
Seismograph
Definition
An instrument that records vibrations in the ground and determines the location and strength of an earthquake
Term
Seismology
Definition
the study of earthquakes
Term
After shock
Definition
weaker earthquakes that follow a stronger earthquake
Term
Transform motion
Definition
occurs where two plates slip past each other
Term
P waves
Definition
*travel through solids, liquids, and gas
*fast
*first waves detected
*move rock back and forth
Term
S waves
Definition
*second fastest wave
*side to side motion
*Slower than p waves
* Travel through solids only
Term
Tsunami
Definition
a large movement of water created by an underwater earthquake
Term
Seismic waves
Definition
a wave of energy that travels through the Earth away from an earthquake in all directions
Term
epicenter
Definition
the point on the Earth's surface directly above an earthquake's starting point
Term
Richter scale
Definition
used to measure strength of earthquake based on units of 10
Term
Mercalli Intensity Scale
Definition
Measures earthquake intensity based on damage and a person's opinion. I to XI
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