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Table 3 Modeling parameters for the 1999 Chi-Chi earthquake in EXSIM

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%