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Recent seismicity in Delhi and population exposure to seismic hazard
Natural Hazards ( IF 3.7 ) Pub Date : 2021-07-19 , DOI: 10.1007/s11069-021-04936-x
Sreevalsa Kolathayar 1
Affiliation  

This paper makes an attempt to review historical and recent seismicity in Delhi and presents updated seismic hazard map of Delhi integrated with ward-wise classified population data. Earthquakes are not destructive unless other factors that enhance the damage prevail. Population density and types or quality of buildings in an area are two such important factors that affect the risk during any hazards, particularly an earthquake. This paper presents the details of the seismic hazard analysis for Delhi with the latest available information on earthquakes and seismic sources within 300 km radius around the city, using state-of-the-art deterministic approach. Ten different attenuation relationships developed for the active tectonic region were considered in the present study. They were ranked using log-likelihood method. Ward-wise population maps along with classified population maps were developed based on the 2011 census data. Hazard contour map and population maps are presented in this paper to revisit the seismic risk prevailing in the region. An attempt was made to overlay the hazard map with population maps showing the distribution of various classes of the population that reflects the seismic risk exposure to different wards of Delhi.



中文翻译:

德里最近的地震活动和人口暴露于地震危险中

本文试图回顾德里的历史和近期地震活动,并结合按病房分类的人口数据提供了德里的最新地震危险图。地震不是破坏性的,除非有其他加剧破坏的因素。一个地区的人口密度和建筑物的类型或质量是影响任何灾害(尤其是地震)风险的两个重要因素。本文使用最先进的确定性方法,介绍了德里地震危险性分析的详细信息,以及有关该城市周围 300 公里半径范围内地震和震源的最新可用信息。本研究考虑了为活动构造区域开发的十种不同的衰减关系。他们使用对数似然法进行排名。基于 2011 年人口普查数据开发了分区人口地图和分类人口地图。本文提出了灾害等高线图和人口图,以重新审视该地区普遍存在的地震风险。尝试将灾害地图与人口地图叠加,显示不同人口类别的分布,反映了德里不同病房的地震风险暴露程度。

更新日期:2021-07-19
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