- Ground-motion model is:
- Find that Icelandic data does not fit other published relations.
- Find equation using only records with M ≥ 4.0, h equal to focal depth and both the horizontal components.
- Find equation using only records with M ≥ 4.0, h equal to focal depth and larger horizontal component.
- Also repeated with all data. Anelastic coefficient constrained to zero because otherwise positive.
- Also done with h free.
- Note that large earthquakes have h ≈ 10km while small events have h ≈ 5km.