- Ground-motion model is: where A is in g, a1 = -1.229(0.196), a2 = 0.277(0.034), a3 = -0.00231(0.00062), a4 = 6.650(2.612),
σ1 = 0.1223(0.0305) (inter-event) and σ = 0.2284(0.0127) (intra-event), where numbers in brackets are
the standard errors of the coefficients.
- Provide algorithm for random effects regression.
- Note that the functional form adopted in Brillinger and Preisler (1984) is strictly empirical and hence
repeat analysis using functional form of Joyner and Boore (1981), which is based on physical reasoning.
- Note that need correlations between coefficients, which are provided, to attach uncertainties to estimated