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Earthquakes Lecture

by: Frances Cooke

Earthquakes Lecture GEOL 1005

Frances Cooke
Environmental Geology
Glenn Havelock

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About this Document

These notes cover two weeks of lectures on earthquakes. Overview: Triggers Seismology Measuring earthquakes Hazards Specific examples
Environmental Geology
Glenn Havelock
75 ?




Popular in Environmental Geology

Popular in Geology

This 2 page Bundle was uploaded by Frances Cooke on Sunday November 15, 2015. The Bundle belongs to GEOL 1005 at George Washington University taught by Glenn Havelock in Fall 2015. Since its upload, it has received 28 views. For similar materials see Environmental Geology in Geology at George Washington University.


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Date Created: 11/15/15
Magnitude 0 Chile 95 1960 o Richter scale using seismograph o Magnitude 8 is how many times more powerful than a 4 I 10000 0 6 to 65 begins property damage Northridge earthquake zones of earthquake intensity damage collected by survey Hector Mine Earthquake o Mojave Desert 0 71 magnitude 0 Very little damage very little intensity depending on damage Ancient China living in underground caves Collapse Earthquakes don t kill people buildings kill people 0 Building collapse 0 Hazard prevention architecture designing buildings to be able to sway 0 Haiti infrastructure weak major building collapse 14b Earthquake destruction 0 Ground shaking and collapse 0 Type of material that structures are built on bedrock versus sediment mud gravel unconsolidated material Design of structures Spatial pattern of damage I Pattern of damage caused by earthquakes is not uniform depends on underlying rock material 0 Liquefaction of the ground I Quicksandlike I Unconsolidated material saturated with water turns into mobile fluid gt becomes more compact Landstes o Triggered by ground shaking o More damage based on water content Fire Broken gas lines Electric lines Ruptured fuel tanks Ruptured water lines difficult to extinguish San Fran earthquake 1906 Prince William Sound AK 1964 I Tank farm fire OOOOOO Tsunami 0 Go inland a few miles 0 Drag everything back out with them 0 Several waves OOOO Triggered by undersea earthquakes Nothing to do with tides not a tidal wave stupid Other triggers volcanic eruptions Heights over 30 meters combination with shallow coastal water I Hit shallow ground slows down and builds up Mitigation warning system


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