2.329 Iervolino et al. (2010)

• Ground-motion model is:

  where Y is in cm∕s2, a = 1.12, b = 0.34, c = -0.89, d = 0.16, e = -0.065, h = 5.0 and σ = 0.19 (when using r_epi) and a = 1.44, b = 0.27, c = -0.87, d = 0.16, e = -0.016, h = 5.8 and σ = 0.18 (when using r_jb). h values taken from Sabetta and Pugliese (1987).

• Use 3 site classes:

  Rock

  S₁ = S₂ = 0

  Shallow alluvium

  S₁ = 1, S₂ = 0

  Deep alluvium

  S₂ = 1, S₁ = 0.

• Use data of Sabetta and Pugliese (1987).
• Derive model to show concept of conditional hazard maps.
• Find that maximum-likelihood regression leads to similar coefficients.
• Test significance of e using Student t-test and find that the null hypothesis that it equals zero cannot be rejected at 5%.
• Use Shapiro and Wilk test to check that residuals are normally distributed. Results (not shown) indicate that the null hypothesis of normality cannot be rejected at 5% significance level.