- Ground-motion model is:
where cm∕s2, a

is in_{1}= 1.31, a_{2}= -0.92 and a_{3}= 1.455 (σ is not given). - Uses data from former USSR, former Yugoslavia, Portugal, Italy, Iran, Greece and Pakistan.
- Peak ground accelerations have either been taken from true-to-scale accelerograms or have been supplied by local networks. Records have not been high- or low-pass filtered because it was found not to work with short records.
- Believes body-wave or local magnitude are the appropriate magnitude scales because interested in the high-frequency range of spectra, which are seen and sampled by strong-motion instruments, and most engineering structures have high natural frequencies.
- Most of the magnitudes were recalculated using P-waves of periods of not more than 1.2s because it was found that the magnitude was dependent on the period of the P-waves used for its determination.
- Groups data into intervals of 0.5 magnitude units by 10km in which the mean and standard deviations of the PGAs is calculated. This grouping minimises distance and magnitude-dependent effects. Notes that the number of observations is barely sufficient to allow a statistical treatment of the data and hence only test general trend. Notes that scatter is significant and decreases with increasing magnitude.