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Implications for Rupture Segmentation

Thrust Fault Geometry beneath the Western Central Valley, and Implications for Laterally Continuous Ruptures Jeff Unruh, FWLA. Implications for Rupture Segmentation. Right-stepping pattern. - Discrete structural segments - En echelon steps = rupture barriers. Restraining stepovers.

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Implications for Rupture Segmentation

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  1. Thrust Fault Geometry beneath the Western Central Valley, andImplications for LaterallyContinuous RupturesJeff Unruh, FWLA

  2. Implications for Rupture Segmentation Right-stepping pattern - Discrete structural segments - En echelon steps = rupture barriers • Restraining stepovers - Rupture length limited by stepover dimensions - Thrust slip rate = f (strike - slip rate)

  3. Seismic Source Zones for the Sacramento-San Joaquin Delta William Lettis & Associates, Inc.

  4. Fault-Propagation Folding Above the Southern Midland Fault

  5. Conclusions • Blindthrustgeometrybeneaththe Central Valley is more complexthan currentlymodeled • En echelonstepsprobablylimitruptures

  6. Section D - D'

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