- Ground-motion model is:
where A in in cm∕s2, C

_{1}= 0.80 ± 0.05, C_{2}= -0.30 ± 0.08, C_{3}= -2.93 and σ = 0.314 using r_{epi}and C_{1}= 0.79 ± 0.05, C_{2}= -0.89 ± 0.38, C_{3}= -1.43 and σ = 0.341 using r_{hypo}. - Adjust observations by multiplicative factor S to account for site conditions (0.8 ≤ S ≤ 1 for hard rocks, 0.7 ≤ S ≤ 0.8 for thin sedimentary layers and 0.65 ≤ S ≤ 0.7 for thick sedimentary cover.
- Focal depths between 60 and 166km.
- Data from digital strong-motion network (K2 instruments) from 1997 to 2000 (4 ≤ M
_{w}≤ 6) plus data (SMA-1) from 30th August 1986 (M_{w}7.1) and 30th and 31st May 1990 (M_{w}6.9 and 6.4) earthquakes. - Regression in two steps: a) dependence on M
_{w}found and then b) dependence on R is found (details on this procedure are not given). - Also regress using just K2 data (log A = 0.94 ± 0.09M
_{w}- 1.01 ± 0.42log R - 1.84, σ = 0.343) and using r_{epi}(log A = 0.89 ± 0.09M_{w}- 0.28 ± 0.09log Δ - 3.35, σ = 0.322). Note that correlation coefficients are higher and σs are lower when all data is used and that match (based on relative residuals) to data from 1986 and 1990 earthquakes is better when all data is used. - Present relative residuals for sites in epicentral area and in Bucharest. Note that for 63% of earthquakes relative errors are < 50% for at least one station; for 43% of earthquake relative errors are < 30% for at least one station; and for 9 earthquakes relative errors are smaller than 10% for at least one station (BMG, the extreme site). Based on this analysis it is concluded that predictions more reliable in far-field than in epicentral area. Also find that largest absolute residuals are for MLR (stiff rock).
- Note largest relative errors are for 4 ≤ M
_{w}≤ 4.5.