where v = 0 for horizontal component, 1 for vertical, h is depth of sedimentary deposits beneath recording
station and Att(Δ,M,T) is same as Trifunac and Lee (1989) (see Section 4.35).
Response parameter is pseudo-velocity for 0, 2, 5, 10 and 20% damping.
For M > 6.5 uses different (unspecified) magnitude scales because for seismic risk analysis often catalogues
do not specify scale and often estimates are not homogeneous.
Free-field records with both soil and alluvial depth information.
Screens data to minimize possible bias due to uneven distribution of soil classification or excessive
contribution from several abundantly recorded earthquakes.
Also uses method where site coefficients, _{7}^{(1)} & _{7}^{(2)}, are found from residues from equation without site
coefficients; find similar results.