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Geological Evidence of Paleo-seismic Events Occurred Along the Chelungpu Fault Zone, Taiwan

臺灣車籠埔斷層帶古地震事件之地質證據

並列摘要


Field and excavation investigations show that at least two (historic) seismic events occurred along the northeastern segment of the Chelungpu fault during the period between 1800 AD and 500 AD before the 1999 Chi-Chi earthquake. The principal indicators of paleo-seismic faulting events are: (i) termination of secondary faults, (ii) deformation of deposits related to faulting, and (iii) liquefaction of deposits. The observational results show that the offset produced by an individual faulting event is ~ 1 m. It is inferred that the probable magnitude of these two paleo-earthquakes is 7.0-7.5.

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