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The New Madrid FaultBrendan Ninneman
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HistoryReelfoot Rift
Failed breakup of Supercontinent Rodinia (750 million years ago)
Sand Blows
Formed about 4800 B.C. and 3500 B.C.
Similar to New Madrid
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Current AreaFour-segment, zig-zag fault system
125 miles long
Fault extends from Marked Tree, Arkansas to Cairo, Illinois
Rocks in the region are harder, colder, dryer, and less fractured
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Earthquakes of 1811-12Strongest earthquake recorded east of Rocky Mountains
Five major earthquakes (magnitude 7.0), 15 earthquakes (6.5-8.0), 189 earthquakes (5.0-6.5)
Reelfoot Lake created
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Worst Case$300 Billion in Direct Economic Loss (Three times worst than Phase I)
3,500 Fatalities
2.6 Million Households without power
Bedrock In Downtowns
St. Louis - 10 feet below surface
Memphis - 3,000 feet below surface
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Are We Ready?Short Answer:
No
City Buildings
Monsanto Center
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SummaryThe region is We are overdue for a earthquake the size of a 6.3 by 30 years
Majority of buildings are not up to date on earthquake standards
No change in the foreseeable future
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