Earthquakes and Earth Layers.
Terms in this set (...)
Earthquake generated waves which travel through the earth
Center of Earth. Outer: liquid metal, Inner: solid metal.
The outermost layer of the Earth. Contains the asthenosphere and part of the lithosphere. Some regions are more solid than others (Below the asthenosphere).
Middle layer of the earth. Contains the asthenosphere and part of the lithosphere. Some regions are more solid than others (below the asthenosphere).
Made of basalt. Located BELOW oceans. More dense. Thinner than continental crust.
Made of granite rock. Located below continents. Less dense than oceanic crust, but thicker.
Caused by tension forces pulling rocks apart. Rock above fault surface moves downward.
Caused by shear forces pushing the rocks past each other.
Caused by compression forces pushing from opposite directions that force rock above the fault up and over rock below the fault.
A measure of the energy released by an earthquake (Richter scale, quantitative)
Used to describe the strength of an earthquake and is based on the HEIGHT of the lines on the seismogram (quantitative data)
An instrument which measures seismic waves from earthquakes. Registers waves onto a seismogram (contains the zigzaggy lines) which shows an earthquakes magnitude.
The point where energy release first occurs UNDER earth's surface.
The point ON earth's surface directly above the earthquakes focus. Place where EQ is first felt/detected on Earth.
Primary Wave (p-wave)
Causes particles in rock to move back and forth in the same/parallel direction the wave is traveling. Fastest of seismic waves. Move like a slinky
Secondary wave (s-wave)
Cause particles in rock to move at right angles (perpendicular) to the direction the wave is traveling. Second fastest seismic wave. Stopped by liquid. Move like a whipped rope.
Most destructive waves which moves rock in a backward, rolling motion and side to side. Produced when the EQ energy reaches the Earth's surface.
Ocean waves caused by earthquakes that happen under the water.
When wet soil is shaken by an EQ and causes it to act more like a liquid.
Mass divided by Volume; how much matter is packed inside a certain volume.
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