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| dip.calc | Estimation of Fault Dip |
| getPeriod | Spectral Periods for NGA Models |
| interpolate | Interpolation for Intermediate Spectral Periods |
| mainshocks | Example Earthquake Records from the NGA Flatfile |
| modelPeriods | Spectral Periods for NGA Models |
| nga | Ground Motion Predictions for all NGA Models |
| Rrup.calc | Calculation of Source-to-Site Distance Measures |
| Rx.calc | Calculation of Source-to-Site Distance Measures |
| Sa | Ground Motion Predictions for Individual Models |
| Sa.as | Ground Motion Predictions for Individual Models |
| Sa.ba | Ground Motion Predictions for Individual Models |
| Sa.cb | Ground Motion Predictions for Individual Models |
| Sa.cy | Ground Motion Predictions for Individual Models |
| Sa.nga | Ground Motion Predictions for all NGA Models |
| Sa.ngaR | Ground Motion Predictions for all NGA Models |
| W.calc | Estimation of Down-Dip Rupture Width, W |
| Z1.calc | Estimation of Depth Parameter, Z1.0 |
| Z1.calc.as | Estimation of Depth Parameter, Z1.0 |
| Z1.calc.cy | Estimation of Depth Parameter, Z1.0 |
| Ztor.calc | Estimation of Depth to Top of Rupture, Ztor |