- Ground-motion model is:
where a = 0.0586, b = 0.696, c = 12.0, d = -1.858, e = 0.205, σ = 0.399 (intra-event) and τ = 0.201 (inter-event) (units of y are not given but probably g).

- F is fault type (details not given).
- Develop new algorithm for one-stage maximum-likelihood regression, which is more robust than previous algorithms.