Lec21 - University of California, Berkeley Civil...

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University of California, Berkeley Professor Ken Johnson Civil Engineering 70 Engineering Geology Civil Engineering 70 Lecture 21 11/8/07 Earthquake / Faulting o Why Earthquakes occur o Ground Shaking characterization o Elastic Rebound Theory o Wave Types o Magnitude versus Intensity o Faulting o Alquist Priolo Act o Liquefaction Different types of ground movement occurs in different areas Faults o Go off and they lock The Faults are not moving and builds stress o Or they just creep Lateral Fault o If you look on the other side of a fault and see things moved to the right, then it is a Right Lateral Fault o Otherwise it is a Left Lateral Fault Elastic Rebound Theory o Terminology o Focus – the point on a fault where slip begins o Epicenter – the geographic point on the earth’s surface directly above the focus o Surface Rupture – trace of surface displacement after an earthquake Parkfield o Magnitude 6.0 or greater earthquake every 20 years on the San Andreas fault o It’s frequency created SAFOD Geologist put hundreds of millions of instruments into the ground to learn about the earthquake o Best recorded earthquake
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This note was uploaded on 04/02/2008 for the course CE 70 taught by Professor Johnson during the Fall '07 term at University of California, Berkeley.

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Lec21 - University of California, Berkeley Civil...

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