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Earthquake Waves

Earth Science terms about Earthquakes and Seismic Waves

TermDefinition
A vibration of Earth by rapid energy release. Earthquake
The point where the earthquake starts. Focus
The location on the surface directly above the focus. Epicenter
The rocks/plates slip back into an unbent position. Elastic Rebound
The movement that follows a major earthquake. Aftershock
Small earthquakes before a major earthquake. Foreshock
Measures the amount of shaking at a particular location. Intensity
Measures size of the earthquake at it's source. Magnitude
Measures intensity based on observed effects of quake on everything it hit. Mercalli Scale
Measures earthquake energy from seismic waves using a seismograph. Richter Scale
Instrument for recording earthquakes. Seismograph
The data output (recording) of a seismograph. Seismogram
A disturbance that transmits energy. Wave
Wave and particle motion are perpendicular. Transverse Wave
Wave and particle motion are parallel. Longitudinal Wave
Material a wave moves through. Medium
Upward displacement. Crest
Downward displacement. Trough
Displacement from rest. Amplitude
Distance between consecutive waves. Wavelength
Primary body waves; seismic waves which push and pull; least damage; fastest; longitudinal. P Waves
Secondary body waves; seismic waves which shake and shear; 2nd rank in damage. S Waves
Slowest waves, 1st in damage rank. Surface Waves
Use delay to find distance to epicenter. Travel-Time Graph
Locating the epicenter. Triangulation
Created by: ajminot
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