Earthquakes and Faults 11 (1)

Earthquakes and Faults 11 (1) - Earthquakes and Faults San...

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Earthquakes and Faults USGS Prof. Paper 1515 Parkfield “Shudder” San Andreas Fault
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H.F. Reid (1910) Elastic Rebound The mechanics of the earthquake, v. 2 of The California Earthquake of April 18, 1906: Report of the State Earthquake Investigation Commission: Carnegie Institution of Washington Publications 87, 192 pp.
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Fig. 4.12
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Fault Geometries
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Fig. 4.7b
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Fig. 4.8
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Rock Failure s 3 s 3 s 2 = ? s 1 s 1 s 1 s 3 s 2 > > s (stress) = Force area
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Normal Fault
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Rock Failure UP Reverse Fault s 1 3 (Normal Fault) Rotate 90 degrees
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Fig. 4.10
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Rock Failure s 1 s 3 s 3 s 1 Map View *another 90º rotation) N E Strike Slip Fault
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Fig. 4.2
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Figure 4.11
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Transpression (pop-up)
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Transverse Ranges
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Trans-tension (pull apart)
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Basic Fault Geometries Hanging wall Footwall Hanging wall Footwall
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Rock Mechanics http://www.pet.hw.ac.uk/research/rmg/index.cfm
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Rock Failure s 3 s 3 s 2 = ? s 1 s 1 s 1 s 3 s 2 > > s (stress) = Force area
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Controls on Strength: P and T Scholz, 2002, Mechanics of Earthquake Faulting
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Controls on Strength: Composition granite limestone Increasing P Scholz, 2002, Mechanics of Earthquake
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Controls on Strength: Water Pumping of fluids into/out of ground Fluid loading (dams) (induced seismicity)
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