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| Version | Notes | SRF Gen | SRF LF dx/dy/dz | AWP Code | LF Anelastic Para | Vs,min | VM dx/dy/dz | LF Site Amp | SRF HF dx/dy/dz | HF # of Rays | Stress Drop | HF Anelastic Para | Kappa | HF Duration | HF Site Amp | Trans. Freq | BB Merge |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| gmsim_v10.1.1 | GP10 approach | genslip-v3.0 | 0.1km | Emod3d V3.0.4 | Qs=50Vs; Qp=2Qs | 500m/s | 0.1km | CB08; empirical till T=2s, then linear decrease till 5s. | 2km | 1 | Constant Δσ=5MPa | Qs=a+bVs | κ=0.045 | 1/fc + 0.063R | CB08 for f<0.5Hz, tapered from 0.5-0.5Hz then =1 for f<0.2Hz | 1Hz 0.5Hz 0.25Hz | 4th order butterworth Fourier spectrum amplitudes |
| gmsim_v15.1.1 | GP15 approach | genslip-v3.3 | 0.1km | Emod3d V3.0.4 | Qs=50Vs; Qp=2Qs | 500m/s | 0.1km | Same as gmsim_v10.1.1 | 2km | 1 | Constant Δσ=5MPa | Qs=a+bVs a=41 b=34 | κ=0.045 | 1/fc + 0.063R | Same as gmsim_v10.1.1 | 1Hz 0.5Hz 0.25Hz | 4th order butterworth Fourier spectrum amplitudes |
| GP16 approach | genslip-v5.0.c | 0.1km | Emod3d V3.0.4 | Qs=50Vs; Qp=2Qs | 500m/s | 0.1km | CB14  ; empirical till T=2s, then linear decrease till 5s. | 2km | 1 | Constant Δσ=5MPa | Qs=a+bVs a=41 b=34 | κ=0.045 | 1/fc + 0.063R | CB14 , same tapering for gmsim_v10.1.1 | 1Hz 0.5Hz 0.25Hz | 4th order butterworth on power spectrum amplitudes | |
| gmsim_v18.5.1 | gmsim_v16.1.1 with modified path duration and long period site amp | genslip-v5.2.3a.c | 0.1km | Emod3d V3.0.4 | Qs=50Vs; Qp=2Qs | 500m/s | 0.1km | None or CB14; empirical till T=1s, then linear decrease till 2s. | 2km | 1 | Constant Δσ=5MPa | Qs=a+bVs a=41 b=34 | κ=0.045 | 1/fc + 0.07R | CB14 only applied for HF; site amp for LF if tapered from 1-0.5Hz. | 1Hz 0.5Hz 0.25Hz | 4th order butterworth on power spectrum amplitudes |