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Barnett - Earthquakes

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Question
Answer
focus   point within Earth where the earthquake starts  
epicenter   location on the surface directly above the focus  
fault   fractures in the Earth where movement has occurred  
aftershock   movement that follows a major earthquake  
seismograph   instrument that records earthquake waves  
surface waves   seismic waves that travel along Earth's outer layer  
body waves   waves that travel through Earth's interior; include primary and secondary waves  
primary wave   fastest body wave; compressional  
secondary wave   slower than a primary wave; move particles perpendicular to the direction of wave  
moment magnitude   measurement for earthquakes used by scientists; estimates the energy released by earthquakes  
Richter Scale   magnitude scale based on the amplitude of the largest seismic wave; used in most news reports  
tsunami   Japanese word for seismic sea wave  
intensity   measure of damage to the surface and effects on humans  
three   number of seismic stations required to locate an epicenter  
foreshocks   small earthquakes that preceed a major earthquake  


   


 

 

 

 

 

 
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