1. By NTU Palert, CWB & NCDR teams

2. Wu and Chiao (2006)

3. Background 1994 to Chi-Chi M>=2.0 Radius 20 km Depth <= 40 km

4. Background 1994 to 2003/12/09 M>=Mc B value (Aki) Radius 25 km Depth <= 35 km Relocated catalog Wu et al. (2008)

6. Chan et al. (2012)

13. For both onsite & regional early warning purposes

14. iTouch for backup power (4 hrs), display and sound warning

15. 345 stations

22. CWB and Palert real-time strong motion stations

23. CWBSN & Palert Shaking maps

27. Use 5 km as grid spacing and use inverse square distance as weighting factor to calculate each point PGA. One point represents 25 square km area. Grid setting

28. Case 1 8 3822

30. Case 2 8 20 40

32. Thanks for your attention