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首页> 外文期刊>Journal of Asian earth sciences >Prehistoric earthquakes along the Shanchiao fault, Taipei Basin, northern Taiwan
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Prehistoric earthquakes along the Shanchiao fault, Taipei Basin, northern Taiwan

机译:台湾北部台北盆地山桥断裂带的史前地震

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摘要

Stratigraphic relations recorded in boreholes drilled along the Shanchiao fault, a normal fault that bounds the western margin of metropolitan Taipei, reveal evidence of early-mid Holocene subsidence and active extension of the Taipei Basin. Paleoseismic data suggest that the maximum displacement for each subsidence event ranges from 2.3 to 4.5 m. Despite large uncertainties, the large offsets imply earthquake magnitudes that range in size from 6.9 to 7.1. Our results suggest that large magnitude earthquakes along the Shanchiao fault are one of the major seismic hazards in the metropolitan Taipei area.
机译:沿山乔断层(该断层为大都市台北西缘的正常断层)所钻的钻孔中记录的地层关系揭示了早中新世沉降和台北盆地活跃扩张的证据。古地震数据表明,每个沉陷事件的最大位移范围为2.3至4.5 m。尽管不确定性很大,但较大的偏移量意味着地震震级范围为6.9至7.1。我们的研究结果表明,山桥断裂带发生的大地震是台北市区的主要地震灾害之一。

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