Pseudo-Static Analysis

Hello everyone,
For a pseudo-static analysis, with a horizontal seismic coefficient equal to 0.2g, is it correct to simply modify the model gravity to (-0.2*9.806, 0, -9.806) and then cycle the model ?
Thank you.

It depends on whether the slope faces the X- or X+ direction; the first component could be either a negative or positive sign.

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