- Ground-motion model is:
- Use records from sites with V s,30 ≥ 500m∕s.
- Use the NGA Flatfile.
- Response parameter is acceleration for 5% damping.
- Data divided into magnitude intervals of: 5.0–5.4, 5.5–5.9, 6.0–6.4, 6.5–6.9 and 7.0–7.5 and distance
intervals of: 0–2.9km, 3.0–9.9km, 10–29.9km, 30 - 59.9km, 60-99.9km, 100–200km and > 200km. Use
weighted regression with weights given by inverse of number of records in each magnitude-distance bin
since most data from moderate earthquakes at intermediate distances.
- Compute C5 and C6 using data from six earthquakes: 1979 Imperial Valley (M6.53), 1980 Livermore
(M5.42), 1989 Loma Prieta (M6.93), 1992 Landers (M7.28), 1999 Hector Mine (M7.13) and 2004 Parkfield