- Ground-motion model is:
where Y is in cm∕s2, C1 = 4.85, C2 = 1.02, C3 = -1.90 and σ = 0.50 (the coefficients 15 and 0.31 were
taken from Theodulidis and Papazachos (1992) since they cannot be determined by the data).
- Use 2 site classes:
S = 0
S = 1
- Use data from mainshock and aftershocks of 13 May 1995 Kozani-Grevena earthquake.
- Use a four-step approach: derive relation between PGA and intensity (using only data from largest events),
assess decay of PGA with distance, adjust PGA to a fixed distance using this equation and finally regression
to find remaining coefficients.
- Adjust all data to Mw6.6 and compare observed and predicted PGAs. Find reasonable fit.