EQ-lect7_6_

EQ-lect7_6_ - Transpression Earthquakes And other Natural...

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1 Earthquakes And other Natural Hazards Last lecture… CA Fault Systems Transpression
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2 outline • What are the main fault zones in California? • What is liquefaction? • How does rock type influence shaking intensity? • What are some of the biggest earthquakes in California? Niigata, Japan 1964 Loss of bearing strength Mission District, SF 1906 Loss of bearing strength ‘Boiling Sand’, Loma Prieta 1989 Ejection of sand-laden water SF 1906 Settlement Three requirements • Loose, granular sediment • Saturation of sediment with ground water • Strong shaking
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3 Liquefaction hazards in Alameda/Oakland 4/21/2009 topic • Midterm Results Midterm 1 Midterm Mean 74.3% (22.3 of 30 points) Highest 96.7% (29 of 30 points) Lowest 33.3% (10 of 30 points) Grade Cut-offs A+ 97 A9 3 A- 90 B+ 87 B8 3 B- 80 C+ 77 C7 3 C- 70 D+ 67 D6 3 D- 60 A B C D 4/21/2009 topic • Lectures until next midterm
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4 7 04/22 Tsunamis 8 04/27 Earthquake risks and prediction 9 04/29 Volcanoes: tectonic environments and eruptions 10 05/04 Volcanoes: hazards and mitigation 11 05/06 Pompeji
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EQ-lect7_6_ - Transpression Earthquakes And other Natural...

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