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Ground motion prediction equation for north India, applicable for different site classes
Soil Dynamics and Earthquake Engineering ( IF 4 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.soildyn.2020.106425
Harinarayan Nh , Abhishek Kumar

Abstract The region of north India has been witnessing frequent earthquakes (EQs) and subsequent induced effects from time to time (1720 Delhi EQ, 1905 Kangra EQ, 1999 Chamoli EQ, 2005 Muzzafarbad EQ, etc.). The seismic hazard of the region is collectively due to Himalayan EQs as well as EQs from regional sources in Aravalli and Indo-Gangetic basin. Previously attempted seismic hazard studies in the region used ground motion prediction equation (GMPE) developed/found suitable for the Himalayas. Keeping in mind that the propagation path which seismic waves during an EQ take to reach north India, is through north India and not the Himalayas, existing GMPEs for the Himalayas have limited application for north India. Besides, unless details of site class (SC) of regional recording stations are available, ground motion records from these recording stations cannot be used to develop SC specific GMPE. This study utilizes source, propagation path, and site characteristics of north India, which were developed earlier by the current authors, to developed GMPE for north India using finite source model. Proposed GMPE is applicable for magnitude (Mw) range of 3.5–7.8, up to epicentral distance of 250 km and for NEHRP SCs A/B, C, D, and E separately. Proposed GMPE can be used to estimate seismic hazard as well as quantification of induced effects for the region and is first of its kind. Comparisons of regional records for each SCs with proposed GMPE show close matching.

中文翻译:

印度北部地震动预测方程,适用于不同场地等级

摘要 印度北部地区不时发生频繁的地震(EQs)和随后的诱发效应(1720 Delhi EQ、1905 Kangra EQ、1999 Chamoli EQ、2005 Muzzafarbad EQ等)。该地区的地震危险性共同归因于喜马拉雅EQs以及来自Aravalli和Indo-Gangetic盆地区域震源的EQs。先前尝试在该地区进行地震灾害研究时使用了开发/发现适用于喜马拉雅山的地面运动预测方程 (GMPE)。请记住,在 EQ 期间地震波到达印度北部的传播路径是通过印度北部而不是喜马拉雅山,现有的喜马拉雅山 GMPE 对印度北部的应用有限。此外,除非可以获得区域录音站的站点等级 (SC) 的详细信息,这些记录站的地面运动记录不能用于开发 SC 特定的 GMPE。本研究利用当前作者较早开发的印度北部的源、传播路径和站点特征,使用有限源模型开发了印度北部的 GMPE。提议的 GMPE 适用于 3.5-7.8 的震级 (Mw) 范围,震中距可达 250 公里,并分别适用于 NEHRP SCs A/B、C、D 和 E。提议的 GMPE 可用于估计地震危险以及对该地区的诱发影响进行量化,这是同类中的第一个。每个 SCs 的区域记录与提议的 GMPE 的比较显示紧密匹配。使用有限源模型为印度北部开发 GMPE。提议的 GMPE 适用于 3.5-7.8 的震级 (Mw) 范围,震中距可达 250 公里,并分别适用于 NEHRP SCs A/B、C、D 和 E。提议的 GMPE 可用于估计地震危险以及对该地区的诱发影响进行量化,这是同类中的第一个。每个 SCs 的区域记录与提议的 GMPE 的比较显示紧密匹配。使用有限源模型为印度北部开发 GMPE。提议的 GMPE 适用于 3.5-7.8 的震级 (Mw) 范围,震中距可达 250 公里,并分别适用于 NEHRP SCs A/B、C、D 和 E。提议的 GMPE 可用于估计地震危险以及对该地区的诱发影响进行量化,这是同类中的第一个。每个 SCs 的区域记录与提议的 GMPE 的比较显示紧密匹配。
更新日期:2020-12-01
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