P,S and L waves

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Information about P,S and L waves

Published on February 24, 2009

Author: mwarner1968

Source: authorstream.com

P,S and L WavesCh 6 : P,S and L WavesCh 6 Elastic Rebound : Elastic Rebound The stress between two plates, or on two sides of a fault build up until they slip, releasing all the energy. Focus; where the slippage occurs Epicenter; the point on the surface directly above the focus Slide 3: Most continental Earthquakes occur within 70 km of surface, shallow focus 70km to 300km intermediate 300km to 650km deep Earthquake Zone : Earthquake Zone Pacific Ring of Fire Mid-Ocean ridges Eurasian-Melanesian Mountain belt Fault Zones : Fault Zones Areas that develop along plate boundaries that are fractured from the stress. San Andreas P Waves : P Waves P waves are the fastest moving 1.7 times faster than S waves P stands for primary P waves move through solid and liquid, and move the direction of the wave, Compression S waves : S waves S stands for secondary S waves cannot move through liquid (center of the Earth) and move rock perpendicular to the wave L waves : L waves L stands for long L waves are the slowest and are caused by P and S waves, that travel over the surface, causing the most damage. L waves are worse when traveling through liquid soils, Vertical Locating Epicenters : Locating Epicenters Locating the epicenter of an earthquake requires 3 seismographs. The location is found by comparing the difference in arrival between the P and S waves.

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