where y is in cm∕s2, a = 0.446, b = 0.00350, c = 0.012, d = 0.446, e = 0.00665, S = 0.941, S_{R} = 0.751, S_{H} = 0.901, S_{M} = 1.003, S_{S} = 0.995, σ_{T } = where σ = 0.135 (intra-event) and τ = 0.203 (inter-event), h_{c} is chosen as 20km because gave positive depth term.
Note site conditions for many stations are uncertain. S is the mean site term for all data.