4023 20 - Earthquakes (1).pptx

# 4023 20 - Earthquakes (1).pptx - GEO 4023 Engineering...

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GEO 4023 Engineering Geology Earthquakes

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Homework Assignment #2 Posted on Blackboard Due last day of class Due in class. After class will be -10 points Each day late will be -10 points No exceptions You can turn it in early for no penalty.
FINAL EXAM Scantron form X-101864 o This class room o See Final Exam Schedule o Need ParSCORE No. X-101864 test form o Covers o Geology of Texas/SA/Edwards o Structure Folds/Faults o Earthquakes o Dams (slides only) o 50 questions new stuff o 50 questions old stuff o You will need a calculator

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FINAL EXAM DATES Section 001: Monday, December 11 @ 7:00am Section 002: Friday, December 15 @ 9:45am Section 003: Tuesday, December 12 @ 9:45am
EARTHQUAKES What’s the big deal?

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Top 10 US Earthquakes Lower 48 States 1. Cascadia subduction zone (1700) ˜9 2. Fort Tejon, California (1857) 7.9 3. San Francisco, California (1906) 7.8 4. Imperial Valley, California (1892) 7.8 5. New Madrid, Missouri (1811) 7.7 6. New Madrid, Missouri (1812) 7.7 - 8.8? 7. New Madrid, Missouri (1812) 7.5 8. Owens Valley, California (1872) 7.4 9. Landers, California (1992) 7.3 10. Hebgen Lake, Montana (1959) 7.3

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Loma Prieta Earthquake October 17, 1989 at 5:04 pm Magnitude 6.9 Killed 63 Injured 3,750 Estimated losses 6 – 10 billion dollars Largest earthquake since 1906 (7.8) Interrupted the World Series Battle of the Bay San Francisco Giants vs Oakland A’s
The total length is 296 miles (477 kilometers). For comparison, the 1989 Loma Prieta earthquake had a rupture length of about 25 miles (40 km).

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Loma Prieta, California, Earthquake October 17, 1989. Roadbed collapse near the interface of the cantilever and truss sections of the San Francisco-Oakland Bay Bridge. View is northwest.

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Loma Prieta, California, Earthquake October 17, 1989. San Francisco. An automobile lies crushed under the third story of this apartment building in the Marina District. The ground levels are no longer visible because of structural failure and sinking due to liquefaction.
Loma Prieta, California, Earthquake October 17, 1989. The collapse of Interstate 880 in Oakland California.

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Loma Prieta, California, Earthquake October 17, 1989. The collapse of Interstate 880 in Oakland California.
Structural failure of the twin bridges carrying Highway 1 across Struve Slough was due to poor design which allowed the supporting pillars to penetrate the roadway.

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Support columns of Highway 1 bridge across Struve Slough protrude through road bed. The poor design of this bridge allowed the supporting pillars to penetrate the roadway.
Northridge Earthquake January 17, 1994 at 4:30 am Magnitude 6.7 Killed 60 Injured 8,700 Estimated losses as high as 25 billion dollars Interrupted filming in Hollywood Seinfeld (Season 5) – “The Pie” Episode The Simpsons (Season 6)- “Bart of Darkness” Episode Star Trek Deep Space 9 – “Profit and Loss Episode

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Did not occur along the San Andreas Fault.
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