- Ground-motion models are, for interface:
where Y is in cm∕s2, c1 = 2.594, c2 = 0.112, c3 = -0.0037, c5 = 0.0075, c6 = 0.474, c7 = -0.0033, σe = 0.20
(inter-event), σr = 0.27 (intra-event) and σ = 0.33 (total) for maximum response; c1 = 2.545, c2 = 0.108,
c3 = -0.0037, c5 = 0.0075, c6 = 0.474, c7 = -0.0024, σe = 0.20 (inter-event), σr = 0.27 (intra-event);
σc = 0.10 (random-orientation variability) and σ = 0.35 (total) for geometric mean; and, for inslab:
where c1 = -0.014, c2 = 0.562, c3 = -0.0039, c5 = 0.0071, σe = 0.10, σr = 0.28 and σ = 0.30 for
maximum response; and c1 = -0.109, c2 = 0.569, c3 = -0.0039, c5 = 0.0070, σe = 0.10, σr = 0.28,
σc = 0.07 and σ = 0.30 for geometric mean.
- All data from firm soil sites (NEHRP class B).
- Similar analysis to that of Hong and Goda (2007) (see Section 2.279) concerning orientation of major
response axis but for data from Mexican subduction zone.
- Use data of García et al. (2005) (see Section 2.238) for inslab earthquakes.
- Focal depths, H, for interplate earthquakes are between 8 and 29km and depths for inslab earthquakes are
between 35 and 138km.
- Examine correlation of ratio of response along an arbitrary direction to the maximum response in direction
of major axis w.r.t. dependent and independent parameters and find that as an approximation there is no
- Provide statistical models to describe the ratio of response along an arbitrary direction to the maximum
response in direction of major axis.
- Term expressing magnitude-dependency of decay (i.e. 1.82 - 0.16Mw) taken from previous study as is
near-source saturation term (i.e. 0.0075 × 100.507Mw).