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PGA distributions and seismic hazard evaluations in three cities in Taiwan

Author

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  • Jui-Pin Wang
  • Su-Chin Chang
  • Yih-Min Wu
  • Yun Xu

Abstract

This study first presents the series of peak ground acceleration (PGA) in the three major cities in Taiwan. The PGAs are back-calculated from an earthquake catalog with the use of ground motion models. The maximums of the 84th percentile (mean + one standard deviation) PGA since 1900 are 1.03, 0.36, and 0.10 g, in Taipei, Taichung, and Kaohsiung, respectively. Statistical goodness-of-fit testing shows that the series of PGA follow a double-lognormal distribution. Using the verified probability distribution, a probabilistic analysis was developed in this paper, and used to evaluate probability-based seismic hazard. Accordingly, given a PGA equal to 0.5 g, the annual exceedance probabilities are 0.56, 0.46, and 0.23 % in Taipei, Taichung, and Kaohsiung, respectively; for PGA equal to 1.0 g, the probabilities become 0.18, 0.14, and 0.09 %. As a result, this analysis indicates the city in South Taiwan is associated with relatively lower seismic hazard, compared with those in Central and North Taiwan. Copyright Springer Science+Business Media B.V. 2012

Suggested Citation

  • Jui-Pin Wang & Su-Chin Chang & Yih-Min Wu & Yun Xu, 2012. "PGA distributions and seismic hazard evaluations in three cities in Taiwan," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 64(2), pages 1373-1390, November.
    • Handle: RePEc:spr:nathaz:v:64:y:2012:i:2:p:1373-1390
    DOI: 10.1007/s11069-012-0298-y
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    References listed on IDEAS

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    1. Jui-Pin Wang & Chung-Han Chan & Yih-Min Wu, 2011. "The distribution of annual maximum earthquake magnitude around Taiwan and its application in the estimation of catastrophic earthquake recurrence probability," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 59(1), pages 553-570, October.
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