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A Kinematic Fault Network Model for Crustal Deformation (including seismicity of optimal locking depth, shallow surface creep and geological constraints) Yuehua Zeng and Zhengkang Shen

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Elastic dislocation theory Locked near the surface. Slip at constant rate below transition depth Locking Depth

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For a given slip distribution on all the faults, the ground deformation vector at any point is obtained by taking a spatial convolution of the static point source Green's function with the fault slip function: where is the shear modulus, i is a unit vector normal to the fault, u j is the j-th component of slip on the fault, and G ni is the Green's function calculated from receiver to source. x is a vector describing the receiver location and is a vector describing the corresponding source point where the Green's function is calculated. 1) assuming fault segments slip at certain rates beneath a locking depth 2) locking depths are defined by local seismicity depth distributions 3) slip vector conservation imposed at fault nodes or intersections 4) depth dependent aseismic creeps

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GPS only

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With geological constraints geological rates

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Comparison of geodetic and seismicity locking depth

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UCERF 3 Testing Block model (with/without seismicity depth, shallow surface creep and geological constraints)

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Fixed depth of 15 km, no creep, no geological constraints

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Seismicity depth, no creep, no geological constraints

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Seismicity depth, creep, geological constraints

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Fixed depth of 15 km, no creep, no geological constraints

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Seismicity depth, no creep, no geological constraints

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Seismicity depth, creep, geological constraints

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Fixed depth, no creep, and no geological constraints Seismicity depth, no creep, and no geological constraints Seismicity depth, creep, and geological constraints

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Fixed depth of 15 km, no creep, no geological constraints

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Seismicity depth, no creep, no geological constraints

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Seismicity depth, creep, geological constraints

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UCERF 2 Model and Its Comparison with the Testing Block model (both with seismicity depth, shallow surface creep and geological constraints)

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