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Dynamic Models of Branched Fault Systems. Jennifer Tarnowski (CSUF), Dr. David Oglesby (UCR), and Dr. David Bowman (CSUF). We use the 3D finite element method to investigate the stress interaction between segments of a branched fault system and the effects on earthquake propagation.

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45°

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  1. Dynamic Models of Branched Fault Systems Jennifer Tarnowski (CSUF), Dr. David Oglesby (UCR), and Dr. David Bowman (CSUF) We use the 3D finite element method to investigate the stress interaction between segments of a branched fault system and the effects on earthquake propagation. Using the fault geometry below, various models were run to determine the conditions under which an earthquake will propagate from the basal fault to both upper branches. Predominant result: rupture propagation over the entire system occurs if there is a barrier on the upper vertical fault that is > ~20-24km2. Free Surface Upper Vertical Fault 45° 5km Upper Dipping Fault 75° 15km Click on video Basal Fault Model representative of propagation on both branches (45km2)

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