Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
earthquake
|
vibrations produced when rocks break along a fault
|
|
|
epicenter
|
point on the earth's surface directly above an earthquake's focus
|
|
|
fault
|
surface along which the rocks move when they past their elastic limit and break
|
|
|
focus
|
in an earthquake the point below earth's surface where energy is relaesed in a form of seismic wave
|
|
|
liquefaction
|
occurs when wet soil acts more like a liquid during an earthquake
|
|
|
magnitude
|
measure of energy released during an earthquake
|
|
|
normal fault
|
break in rock caused by tension focus where rock above the fault surface moves down relative to rock below the surface
|
|
|
primary wave
|
seismic wave that moves rock particles back and fourth in the same direction that the wave travels
|
|
|
reverse fault
|
break in rock caused by compression forces, where rock above the fault surface moves upward relative to the rock below the fault surface
|
|
|
secondary wave
|
seismic wave that moves rock particles at right angles to the dierction of the wave
|
|
|
seismic wave
|
wave generated by an earthquake
|
|
|
seismograph
|
instrument used to register earthquake waves and record the time that each arrived
|
|
|
strike slip fault
|
break in rock caused by shear forces where rocks move past each other without much verticle movement
|
|
|
surface wave
|
seismic wave that moves rock particles up and down in a backward rolling motion and side to side in a swaying motion
|
|
|
tsunami
|
seismic sea wave that begins over an earthquake focus
|
