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Ground Motion Synthesis and Seismic Scenario in Guwahati City—A Stochastic Approach

机译:瓜瓦哈蒂市的地震动综合与地震情景-一种随机方法

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摘要

Guwahati is fast emerging as a multi-ethnic cosmopolitan city with a burgeoning population and rapid unplanned urbanization. It is a commercial hub, catering to eight states in northeast India. The city is located in the lower Brahmaputra Valley and underlain by thick alluvial deposits ranging from 25 to 600 m with granitic exposure at places. The regional seismotectonics of northeast India exhibit a rather large potential for high-magnitude earthquakes, as reported by Thingbaijam et al. (2008). Large earthquakes in the past caused widespread damage to life and property in this terrain. Presently, the urban agglomeration in this area is quite vulnerable to possible future great earthquakes. Given the devastation caused recently by the Sichuan earthquake of 12 May 2008 (MW 7.9), with a death toll of nearly 70,000 and loss of property worth billions of dollars, it is imperative that we have a realistic hazard scenario for this extremely vulnerable seismic province.
机译:古瓦哈提(Guwahati)正在迅速发展成为一个多种族的国际化城市,其人口正在迅速增长,而且城市化进程迅速。这是一个商业中心,可满足印度东北部八个州的需要。该城市位于布拉马普特拉河谷的下游,在厚厚的冲积沉积物之下,埋藏范围从25到600 m,并有花岗岩暴露。根据Thingbaijam等人的报道,印度东北部的区域地震构造具有很高的震级。 (2008)。过去的大地震对这一地区的生命和财产造成了广泛破坏。目前,该地区的城市群很容易受到未来可能发生的大地震的影响。鉴于最近由2008年5月12日的四川地震(7.9兆瓦)造成的破坏,造成近70,000人死亡和价值数十亿美元的财产损失,因此,对于这个极度脆弱的地震省,我们有一个现实的险情势在必行。

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