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23 Cards in this Set

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  • Back
What are the 3 major forces within the rocks of the earth
1. compression
2. Tension
3. shearing
What is a normal falt
a fault caused by tension forces on rocks
What is a reverse faltwhat is a strike falt
a fault caused by tension forces on rock
what is a fracture
a fault caused by rock sliding past each other
what is a fracture
a fraction is a break in the rock
what are seismic waves
seismic waves are earth quakes waves
define focus
Focse: place on the surface of the earthquake starts
what is a seismograph
seismograph instruments detects and mesures earthquakes
what is the epicenter
Epicenter place on the surface of the directly above the focus
what are the characteristics of primary waves
Fastes P-waves pushing together and pulling apart
what are the characteristics of secondary waves
second waves to be recorded
slow
side to side
what are the characteristics of surface waves
L-waves long waves
fast waves
most damage
the release of stored energy when something is stretched to far is known as the
Elastic energy
an earthquake occurs when a sudden movement along a fault releases
energy
shearing forces push rock in what type of directions
Opposite, but not directly opposite, horizontal direction.
as a transverse wave moves through matter, the matter moves
up and down
force when an object pushes, pulls or presses on another object
stress
shaking of the ground caused by sudden movement of large blocks of rocks along a fault
earthquake
a break of fracture in the lithosphere
fault
a small earthquake following a more powerful earthquake
aftershock
what is liquefaction
when shaking causes soil to act like a liquid
what is a tsunami
a water wave triggered by an earthquake, Volcanic eruption, or land slide
How do you locate an earthquakes Epicenter
Triangulation...... Where 3 circles meet