- Ground-motion model is: where Y is in g, c1 = 0.14, c2 = -6.25, c3 = 0.37, c4 = 3.67, c5 = -12.42, c6 = -0.125, c7 = 1.19,
c8 = -6.15, c9 = 0.525, c10 = -0.16, c11 = 18.04, c12 = -167.9, c13 = 476.3, D5 = 0.7, bv = -0.24,
V A = 484.5, R3 = 100km, σ = 0.83 (given by (Graizer et al., 2010) and reported in text of Graizer
et al. (2013)) and σ = 0.55 (Graizer et al., 2013, Figure 6). Coefficients c4, c5, c10–c13 and D5 are newly
derived as is σ — the others are adopted from GMPE of Graizer and Kalkan (2007). D3 = 0.65 for
Z < 1km and 0.35 for Z ≥ 1km.
- Use sediment depth Z to model basin effects.
- Use two faulting mechanisms:
- Strike-slip and normal. F = 1.00
- Reverse. F = 1.28
- Update of GMPE of Graizer and Kalkan (2007) (see Section 2.278) to model faster attenuation for
R > 100km using more data (from the USGS-Atlas global database).
- Compare data binned into 9 magnitude ranges with interval 0.4 and find good match.
- Note that large σ due to variability in Atlas database.
- Using data binned w.r.t. Mw and into 25 distance bins (with spacing of 20km) derive these models for σ:
σ = -0.043M + 1.10 and σ = -0.0004R + 0.89.
- Examine residual plots w.r.t. distance, Mw and V s,30 and find no trends.