- Ground-motion model is:
where Y is in g, c

_{1}= -5.36874, C_{2}= 1.72882, C_{3}= 2.06573, C_{4}= 0.11318, C_{5}= 0.80312 and σ = 0.6619. - Only use data from rock sites (V
_{s,30}> 760m∕s). - Use data from networks of Central Weather Bureau betwen 1991 and 2008.
- Use data from earthquakes with M
_{L}> 5.5 and depth < 35km. Includes data from 1999 Chi-Chi mainshock and 5 aftershocks. Select all data from Real-Time Digital (RTD) network and all data with r_{hypo}< 50km from stations of Taiwan Strong-Motion Instrumental Program because of lack of near-source data from RTD network and distribution w.r.t. r_{hypo}. - Compare predictions and observations for 1999 Chi-Chi earthquake and find good match. Also compute the standard deviation of the residuals from this event.