- Ground-motion model is:
where PGA is in cm∕s2, a = 0.31, b = -0.00091, c = 1.57 and σ = 0.23.

- Use data of Berge-Thierry et al. (2003).
- Focal depths between 0 and 30km.
- Plot r
_{hypo}, epicentral location and M_{s}from ISC against those used by Berge-Thierry et al. (2003). Derive standard deviation, skewness and kurtosis based on these plots. - Account for estimated uncertainties of M and R in fuzzy regression and find same coefficients as standard regression but with estimated uncertainties and lower σ than in standard regression.
- Find that epistemic uncertainties increase at edge of magnitude-distance space.