GEOL 001 Lecture Notes - Lecture 14: North Anatolian Fault, East Pacific Rise, San Andreas Fault
20 Dec 2020
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Document Summary
Two measurements that describe the size of an earthquake are: A measure of the degree of earthquake shaking at a given locale based on the amount of damage. Estimates the amount of energy released at the source of the quake. Number scale from 1-12 based on personal accounts. Everybody runs outdoors , disturbances of trees , fall of chimneys . Mercalli intensity of the new madrid earthquake, dec. 16, 1811. Lines are half-circles curving to east . weren"t very many people living in the west of new madrid. Concept introduced by charles richter in 1935. Based on the amplitude of the largest seismic wave recorded. Accounts for the decrease in wave amplitude with increased distance. Several richter-like magnitude scales have been developed. Developed because none of the richter-like magnitude scales adequately estimate very large earthquakes. Derived from the amount of displacement that occurs along a fault.
