Wave which causes rock particles to move back and forth in the same direction the wave is traveling, the first wave to pass through after an earthquake
Secondary WAve
Wave which causes rock particles to move at right angles to the direction of wave travel, the second wave to pass through the earth after an earthquake
Surface Wave
Wave which causes rock particles to move in a backward rolling and side to side swaying motion, this is the most destructive earthquake wave
Normal Fault
occurs when the two sides of a fault pull apart. The rocks on one side drop down lower than the other side. This is the result of two divergent boundaries undergoing tension. The hanging wall moves downward.
Reverse Fault
a geological fault in which the upper side appears to have been pushed upward by compression
Strike Slip Fault
Break in rock caused by shear forces where rocks slide past each other without much vertical movement
Tension Forces
make rocks move along faults by causing rocks to be pulled apart, causing a normal fault
Seismic Wave
A wave of energy that travels through the Earth and away from an Earthquake in all directons.
Seismologist
a scientist who studies earthquakes
Shadow Zone
area where no seismic waves are detected
Inner Core
a dense sphere of solid iron and nickel in the center of the Earth
Outer Core
a layer of molten iron and nickel that surrounds the inner core of the Earth
Mantle
the layer of the earth between the crust and the core
Magnitude
measurement of energy released by an earthquake; maximum motion shown on a seismograph.
Liquification
Shaking of the soil makes it at more like a liquid causing buildings to collapse
Mercalli Scale
a scale that rates earthquakes according to their intensity and how much damage. Uses Roman Numerals
tsunami
seismic sea wave, generated by a major earthquake in or near an ocean basin
HHS Shrek
