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Using paleo-liquefaction features to determine the likely source, magnitude and ground accelerations of pre-historic earthquakes in the Kashmir Basin (Northwestern Himalaya), India
Engineering Geology ( IF 6.9 ) Pub Date : 2021-07-26 , DOI: 10.1016/j.enggeo.2021.106302
Maqbool Yousuf , Syed Kaiser Bukhari , Gulam Rasool Bhat

Few surface fault scarps or other obvious surficial geomorphic features record pre-historic earthquakes in the Kashmir Basin (KB) in the northwestern Himalaya Mountains of India. We therefore identified liquefaction features exposed in various cuts and trenches in the area, documented these on geological logs, and geotechnically characterized them in order to determine the likely causative earthquake(s), the source area, the inferred paleo-magnitude and the relative ground accelerations. We calculate that the magnitude of liquefaction-producing earthquakes in the KB ranged between 6.4 and 7.3 Mw, and that the peak ground accelerations were on the order of 0.29–0.64 g. We propose that the techniques employed, the data obtained and the technical interpretations, are potentially useful, not only for local general landuse planning and site-specific hazard reduction, but may also be extrapolated to similar tectonically active regions.



中文翻译:

使用古液化特征确定印度克什米尔盆地(喜马拉雅西北部)史前地震的可能来源、震级和地面加速度

在印度喜马拉雅山脉西北部的克什米尔盆地 (KB) 中,很少有地表断层陡坡或其他明显的地表地貌特征记录了史前地震。因此,我们确定了该地区各种切口和沟渠中暴露的液化特征,在地质日志中记录了这些特征,并对它们进行了岩土技术表征,以确定可能的诱发地震、震源区、推断的古震级和相对地面加速度。我们计算出 KB 中产生液化的地震的震级在 6.4 到 7.3 Mw 之间,并且峰值地面加速度约为 0.29–0.64 g。我们建议所采用的技术、获得的数据和技术解释可能是有用的,

更新日期:2021-07-29
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