Challenges for the Next Generation of Seismic Codes - Earthquake Engineering for Structural Design - page 477

Fault normal
Directivity
Fault parallel
Figure 10.2 Distribution of maximum story drifts for strike-slip ground motions
(after Park et al, 2004)
Figure 10.3 shows the story drift distribution for thrust (subduction) ground
motions. The rectangular area represents the projection of the rupture surface and
the star is the position of the epicenter. The fault-normal direction of the largest