March 5 earthqauke notes

March 5 earthqauke notes - GEO 1401 Test 2 Notes March 5...

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GEO 1401 Test 2 Notes March 5, 2008 Notes Most Dangerous places in the US for earthquake zones West coast cali West/central north america New Madrid fault zone (Mississippi river valley) Safest Places Texas- few earthquakes and low intensity Florida peninsula Earthquakes in Texas Low in magnitude- release a small amount of energy Very few earthquakes Areas of earthquakes: o Pan handle o West texas o Band that parallels I35- long linear series of faults Origin of Earthquakes Sudden movement along a fault is the cause of most earthquakes Fault- a fracture in rock with movement on either side Brittle deformation- fautlation of rock Faults occur in the upper mantle and crust, in the shallow part, near the surface. Not many greater than 400 miles in depth Elastic Rebound theory Explains the origin of earthquakes 1. If a rock is stresses (a forced is placed on it) it can store up the energy elastically 2. When the strength of the rock is exceeded the rock breaks (brittle deformation) 3.
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