15 - relatively level areas of differing elevations Sierra...

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21:42 Read Chapter 3 What is an Earthquake? Sudden  slip of blocks on either side of a fault past each other The slippage has to be fast enough to generate seismic waves  Occur on faults Faults? A fracture (crack) across which the blocks on either side have moved past each  other Faults are planar, 3D features Not lines Fault plane Sudden slippage along fault plane = eq. Rupture SEE DIAGRAM 1 Fault “Scarp” Short for Escarpment Offset of ground surface along fit trace during eqs. Steep slope or long cliff that results from erosion or faulting and separates two 
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Unformatted text preview: relatively level areas of differing elevations Sierra El Mayor-Cucapah Earthquake, Baja California. Magnitude 7.2 Right Lateral/Oblique Normal What Causes Eqs? Stress What is Stress? How Does Stress Cause EQS? Stress: Force = Mass x Acceleration Massintrinsic property of the material, mass does not equal weight Stress is a force divided by the area over which that force is acting 21:42 21:42...
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15 - relatively level areas of differing elevations Sierra...

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