- Ground-motion model is:
_{M}= 1.35431, C = 30, b_{R}= -1.58527, a = 1.2 and σ = 0.48884 (definitions of t and g are not given). - Correct PGAs for local site effects so that PGAs used correspond to a site with a shear-wave velocity of 700m∕s. Do not state how this is performed.
- Most records from SMA-1s.
- Not all records from free-field.
- Records from strong intermediate depth earthquakes in Vrancea region.
- Focal depths, 89.1 ≤ h ≤ 131km.
- For each of the four earthquakes, calculate coefficents in equation lnAcc = b
_{0}+ b_{1}ln(R_{e}∕ρ), the main direction of energy propagation and the relation between the semi-axes of the ellipse in two orthogonal directions (a : b). - Also calculate coefficents in equation lnAcc = b+b
_{M}M+b_{R}ln(R_{h}+C) for different azimuth by normalising the values of R_{e}∕ρ by the azimuth. Give coefficients for Bucharest, Valeni and Cerna Voda. - Note that uncertainty is high and suggest this is because of distribution of data with respect to M, R
_{e}and h, the use of data processed in different ways, soil-structure interaction and the use of an approximate correction method for local site effects.