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Week 1

by: Ashley Thompson

Week 1 GEOL105010

Ashley Thompson
GPA 3.2
Geological Hazards and Their Human Impact

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Week 1 of Geological Hazards.
Geological Hazards and Their Human Impact
Class Notes
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This 2 page Class Notes was uploaded by Ashley Thompson on Sunday September 6, 2015. The Class Notes belongs to GEOL105010 at University of Delaware taught by McGeary,Susan in Spring 2015. Since its upload, it has received 14 views. For similar materials see Geological Hazards and Their Human Impact in Geology at University of Delaware.


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Date Created: 09/06/15
09022015 Natural Hazards Introduction PNAS Female hurricanes are deadlier than male hurricanes Risk Assessment 0 Risk 0 quotCostquot X quotProbability in a given yearquot likelihood High cost but low probabilityYellowstone eruption Low cost but high probabilitythunderstorm 0 Hurricane Katrina 1245 died 108 billion 0 Hurricane Sandyljl 2 died 700 million 0 Japan earthquakel 15550 died 309 billion 0 Prediction What size event Where it will occur When 0 Forecast What size event Where Probability of event Long time window 0 Hazard a natural event that could possibly cause some damage in your area 0 Disaster criteria one or more of the following o 10 or more people killed 0 100 or more people affected 0 State of emergency declared Catastrophe massive disaster that requires signi cant amount of money andor time to recover 9415 0 Recurrence Interval Average length of time between events average interval 0 Eventinterval between events 0 1479 RI 154 o 1633 RI 119 o 1752 RI 162 o 1914 RI 12 o 1926 RI 53 o 1979 Total RI 500 years n Avg 500 yrs total5 intervals100 years 0 RI 100 years Probability in a given year 1100 1 001 0 Risk Prob x Cost 001 x 5 million 0 THE TIMING OF FUTURE EARTHQUAKES CANNOT BE PREDICTED BASED ON WHEN THE LAST EARTHQUAKE OCCURRED Second method for computing recurrence intervals 0 Date of last disaster date of earliest disaster of intervals between disaster Approach to Natural Hazards Understand Causes of natural disasters 0 Make a Hazard Map 0 Identify location of hazard where and size how big 0 Determine recurrence interval and probability of event how often 0 Estimate cost of event how much and determine risk Observemonitor any precursor activity and provide warning 0 Mitigate Educate Mitigate Educate Atoms The major subatomic particles that control chemical characteristics are protons neutrons and electrons Electrons nearly massless negative charge 0 Neutrons in nucleus no charge same mass as protons 0 Number of neutrons can change Isotopes all have different atomic weights Some are stable others decay a nd a re radioactive o Decay is used in determining age or rocks Clicker which is heavier 018 or 016 n 018


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