Figure 1. Sliding-block model used for Newmark analysis.

Figure 1. Sliding-block model used for Newmark analysis. The potential landslide is modeled as a block resting on a plane inclined at an angle (

) from the horizontal. The block has a known critical (yield) acceleration (a_c), the base acceleration required to overcome shear resistance and initiate sliding with respect to the base. The block is subjected to a base acceleration (a) representing the earthquake shaking.

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