A New On-Land Seismogenic Structure Source Database from the Taiwan Earthquake Model (TEM) Project for Seismic Hazard Analysis of Taiwan

  • Author(s): J. Bruce H. Shyu, Yi-Rung Chuang, Ya-Lin Chen, Yi-Rui Lee, and Chin-Tung Cheng
  • DOI: 10.3319/TAO.2015.11.27.02(TEM)
  • Keywords: Taiwan Earthquake Model (TEM), Seismic hazard analysis, Seismogenic structure, Database, Slip rates, Recurrence intervals
  • A set of conjugated strike slip faults are assessed outside the Chuan-Dian Block
  • Eastward extrusion of the Chuan-Dian Block is constrained by GPS analysis
  • Strain accumulation status before the Ludian earthquake is quantified

Taiwan is located at an active plate boundary and prone to earthquake hazards. To evaluate the island’s seismic risk, the Taiwan Earthquake Model (TEM) project, supported by the Ministry of Sciences and Technology, evaluates earthquake hazard, risk, and related social and economic impact models for Taiwan through multidisciplinary collaboration. One of the major tasks of TEM is to construct a complete and updated seismogenic structure database for Taiwan to assess future seismic hazards. Toward this end, we have combined information from pre-existing databases and data obtained from new analyses to build an updated and digitized three-dimensional seismogenic structure map for Taiwan. Thirty-eight on-land active seismogenic structures are identified. For detailed information of individual structures such as their long-term slip rates and potential recurrence intervals, we collected data from existing publications, as well as calculated from results of our own field surveys and investigations. We hope this updated database would become a significant constraint for seismic hazard assessment calculations in Taiwan, and would provide important information for engineers and hazard mitigation agencies.

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