For important cases, ground motions should be resolved in
different azimuthal directions so that sliding block analyses
can be used to help identify the range of permanent displacements
that may occur; this process involves simple trigonometric
manipulations that can easily be automated. Because
computed displacements are influenced by the details of the
input motions, including the phasing of the various components,
stable estimates of permanent displacement will require
analyses of suites of input motions