Chapter 6 terms
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Epicenter
the location on Earth's surface directly above an earthquake's focus
Earthquake
A measurable movement of the earths crust
Intensity
A measure of the concentration of energy or the effects of the energy released
Richter scale
A scale that rates the magnitude of the intensity of an earthquake
Seismometer
Instrument used to measure horizontal or vertical motion during an earthquake.
Stress
Measure of force exerted within an object
P wave
The first earthquake wave that reaches a seismic station from an earthquake
Focus
The point of an earthquakes origin deep within the earth
S wave
The second earthquake wave that reaches a seismic station from an earthquake
Magnitude
The size or intensity of some measurable quantity
