DAJB+2.2

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=Vocabulary=


 * focus:** Point that's beneath the Earth's surface where rocks that went under stress and breaks,triggering an earthquake.


 * epicenter:** Point that is directly above the focus.


 * seismic waves:** Vibrations that travel through the earth carrying energy that is realeased during a earthquake.


 * P Waves:** An earthquake with seisemic waves that compress and expand the Earth's plates.


 * S Waves:** An earthquake with waves that move from side to side.


 * surface waves:** Waves move slower than P and S waves, but produce the most violent shakeing.


 * seismograph:** Record ground movements of seisemic waves.


 * Magnetude:** Measure of a earthquakes strength.


 * Mercalli scale:** Measures an earthquakes intensity.


 * Richiter scale:**Measures the sizes of the earthquakes waves.

=Outline=


 * ===Seismic waves===
 * Primary waves
 * Secondary waves
 * Surface waves
 * ===Detecting seismic waves===


 * ===measuring earthquakes===
 * The Mercalli scale
 * The Richter scale
 * The Moment Magnitude scale
 * ===Locating the epicenter===