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Seismic hazard analysis of India using areal sources

机译:使用面源对印度进行地震灾害分析

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In view of the major advancement made in understanding the seismicity and seismotectonics of the Indian region in recent times, an updated probabilistic seismic hazard map of India covering 6-38°N and 68-98°E is prepared. This paper presents the results of probabilistic seismic hazard analysis of India done using regional seismic source zones and four well recognized attenuation relations considering varied tectonic provinces in the region. The study area was divided into small grids of size 0.1° × 0.1°. Peak Horizontal Acceleration (PHA) and spectral accelerations for periods 0.1 s and 1 s have been estimated and contour maps showing the spatial variation of the same are presented in the paper. The present study shows that the seismic hazard is moderate in peninsular shield, but the hazard in most parts of North and Northeast India is high.
机译:鉴于最近在理解印度地区的地震活动和地震构造方面取得的重大进展,准备了覆盖6-38°N和68-98°E的印度最新概率地震灾害图。本文介绍了印度的概率地震危险性分析的结果,该结果是使用区域地震震源区和考虑该地区不同构造省份的四个公认的衰减关系进行的。研究区域分为大小为0.1°×0.1°的小网格。本文估计了0.1 s和1 s周期内的峰值水平加速度(PHA)和频谱加速度,并给出了显示其空间变化的等高线图。目前的研究表明,半岛盾构地震危险性中等,但印度北部和东北部的大部分地区的地震危险性较高。

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