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<p>Noida, a rapidly urbanizing industrial hub in northern India, is vulnerable to seismic hazards due to its proximity to active fault systems and its location on thick alluvial deposits. This study presents the first surface-level seismic hazard map for Noida city, incorporating detailed site response analysis using one-dimensional equivalent-linear modeling. In the present study, a holistic approach has been adopted to obtain a surface-level seismic hazard map of Noida city. A total of 55 borehole data across the city have been compiled. The ground motion used in the site response analysis is derived for the city's seismo-tectonic setting. The Shear wave velocity (Vs) of all the borehole profiles was obtained using the site-specific correlation between Vs and SPT-N, specifically developed for Noida city. The results highlight significant site amplification (AF = 1.23–2.92) and PGA variation (0.13–0.27&#xa0;g) due to local geotechnical conditions. The study also proposes a site-specific design response spectrum, showing that the current Indian standard may underestimate seismic demand at the surface. The findings provide critical inputs for earthquake-resilient urban planning and infrastructure development in Noida.</p>

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Seismic Hazard Microzonation of Noida City Using Site Response Analysis

  • 期刊论文

  • 发表日期：

    2025年10月31日

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  • P. Kundu,
  • A. Pain,
  • J. Das

摘要

Noida, a rapidly urbanizing industrial hub in northern India, is vulnerable to seismic hazards due to its proximity to active fault systems and its location on thick alluvial deposits. This study presents the first surface-level seismic hazard map for Noida city, incorporating detailed site response analysis using one-dimensional equivalent-linear modeling. In the present study, a holistic approach has been adopted to obtain a surface-level seismic hazard map of Noida city. A total of 55 borehole data across the city have been compiled. The ground motion used in the site response analysis is derived for the city's seismo-tectonic setting. The Shear wave velocity (Vs) of all the borehole profiles was obtained using the site-specific correlation between Vs and SPT-N, specifically developed for Noida city. The results highlight significant site amplification (AF = 1.23–2.92) and PGA variation (0.13–0.27 g) due to local geotechnical conditions. The study also proposes a site-specific design response spectrum, showing that the current Indian standard may underestimate seismic demand at the surface. The findings provide critical inputs for earthquake-resilient urban planning and infrastructure development in Noida.