- Ground-motion model is:
where y is in g, C

_{3}= -2.1, C_{4}= 0.616, C_{5}= 0.524 and for M ≥ 6.5 C_{0}= -1.092, C_{1}= 1.10, C_{2}= 0 and σ = 0.36 and for M < 6.5 C_{0}= -0.442, C_{1}= 1.0, C_{2}= 0 and σ = 1.27 - 0.14M. - All records from rock or rock-like sites.
- Separate equation for M < 6.5 and M ≥ 6.5.
- Use only shallow crustal thrust earthquakes.
- Use another database of rock and soil site records and simulated acceleration time histories to find conversion factors to predict strike-slip and oblique ground motions from the thrust equation given above. For strike-slip conversion factor is 0.83 and for oblique conversion factor is 0.91.
- Standard deviation, σ, for M ≥ 6.5 from regression whereas σ for M < 6.5 from previous results. Confirm
magnitude dependence of standard deviation using 803 recordings from 124 earthquakes, 3.8 ≤ M
_{w}≤ 7.4, D < 100km.