From: Across-fault ground motions and their effects on some bridges in the 1999 Chi-Chi earthquake
Parameter | Value |
---|---|
Moment magnitude | 7.6 |
Stress drop Δσ (bar) | 90 |
Kappa (s) | 0.05 |
Fault orientation (strike/dip) | 5°/30° |
Fault dimensions (length × width) | 84 km × 44 km |
Subfault dimensions | 1 km × 1 km |
Slip distribution | Wu et al. (2001) |
Crustal shear-wave velocity (km/s) | 3.2 |
Crustal density (g/cm3) | 2.8 |
Rupture to shear-wave velocity ratio | 0.8 |
Anelastic attenuation, Q(f) | 350(f)0.32 |
Geometric spreading | \( g(r)=\left\{\begin{array}{ll}{r}^{-1.2}& 1<r<10\kern0.5em \mathrm{km}\\ {}{r}^{-0.7}& 10<r<40\kern0.5em \mathrm{km}\\ {}{r}^{-1.0}& 40<r<80\kern0.5em \mathrm{km}\\ {}{r}^{-0.5}& r>80\kern0.5em \mathrm{km}\end{array}\right. \) |
Windowing function | Saragoni-Hart |
Crustal amplification | NEHRP site class C (Boore et al. 1997) |
Pulsing percentage | 50% |