last lecture historical behavior of san andreas fault
Post on 15-Jan-2016
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Last lecture
Historical behavior of San Andreas fault
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We’ve looked at only a few of the interesting historical earthquakes!
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Meade and Hager [2005]
34±3 mm/a
3,700 a
25±3 mm/a
5,900-14,500 a
16±3 mm/a
5,900-14,500 a
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Lecture 21: The San Andreas fault
Neotectonic overview (continued)
• Loma Prieta 1989
• The San Gorgonio Pass jog
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San Andreas fault
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Uplift rates between 0.13 and 0.35 mm/a
Nominal Loma Prieta earthquakes every 300-600 years
442 earthquakes to produce the 125,000-year terrace
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San Gorgonio Pass stepover
What are the actual kinematics?
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The first step in answering this question is to understand the 3-D geometry of the fault system
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What is happening in the San Bernardino Mountains?
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Where are the active structures on the san Gorgonio Pass side of the San Bernardino mountains?
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Active faults and topo of the region
1986 eq
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Broad antiformal warps
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Contours on base of seismicity
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