- Ground-motion model is:
where y is in cm∕s2, d = 0.864 and f = 0.463 and for path A (rock): A = 157 (for median), A = 186 (for mean), B = 1.04 and E = -1.90, for path A (stiff soil): A = 191 (for median), A = 224 (for mean), B = 0.823 and E = -1.56 and for path B (stiff soil): A = 284 (for median), A = 363 (for mean), B = 0.587 and E = -1.05 (σ not given).

- Separate equations for two types of path:
- A
- Shallow focus earthquakes (California, Japan, Nicaragua and India), 63 records.
- B
- Subduction (Benioff) zone earthquakes (Japan and South America), 23 earthquakes, 5.3 ≤ M
_{s}≤ 7.8, 32 records.

- Use two site categories for path A earthquakes for which derive separate equations:
- 1.
- Rock: 21 records.
- 2.
- Stiff soil: 42 records.

Use only stiff soil records for deriving subduction zone equation.

- Most earthquakes for path A have 5 ≤ M
_{s}≤ 6.7. - All data corrected. PGA for corrected Japanese and South American records much higher than uncorrected PGA.