The "Earthquake" frame serves to input earthquake parameters. Directions of input earthquake effects are displayed on the desktop.
If not provided by measurements, the coefficients kh and kv can be calculated following the approach adopted from EN 1998-5.
Analysis of earth pressures while accounting for an earthquake is described in the theoretical part of the help, chapter "Influence earthquake".
For the LRFD Verification methodology, it is possible to define coefficients for seismic combinations according to the AASHTO.