Probabilistic seismic hazard analysis of North and Central Himalayas using regional ground motion prediction equations

Ramkrishnan, R and Kolathayar, S and Sitharam, TG (2021) Probabilistic seismic hazard analysis of North and Central Himalayas using regional ground motion prediction equations. In: Bulletin of Engineering Geology and the Environment .

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Abstract

Recently developed region-specific GMPEs are used for a comprehensive seismic hazard analysis (SHA) of the North and Central Himalayas (NCH) using a probabilistic approach considering two source models. Vulnerable seismic sources in the areas are identified based on the Seismotectonic Atlas (Dasgupta et al. 2000), published by the Geological Survey of India. An up to date, homogenized and declustered earthquake catalogue is compiled from various sources, with earthquake data since 250 BC, to create a new digitized seismotectonic representation of the region. Regional seismic zones having similar seismicity are recognized based on the Gutenberg-Richter (GR) parameters and the region is delineated into 5 seismic zones. The study area is divided into grids of size 0.05° � 0.05° and the hazard in terms of Peak Ground Acceleration (PGA) at the centre of each grid point is estimated and presented as hazard maps for individual seismic sources, maximum of all sources, and average of both sources. From the current study, it could be concluded that the PGA estimated in the regions is comparatively higher than what is reported in the codal provisions for seismic zonation and estimation of design horizontal acceleration for the region. © 2021, Springer-Verlag GmbH Germany, part of Springer Nature.

Item Type:	Journal Article
Publication:	Bulletin of Engineering Geology and the Environment
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	The copyright for this article belongs to Springer Science and Business Media Deutschland GmbH
Keywords:	Earthquakes; Equations of motion; Hazards; Seismic design; Seismic response, Developed regions; Earthquake catalogues; Ground-motion prediction equations; Horizontal acceleration; Peak ground acceleration; Probabilistic approaches; Probabilistic seismic hazard analysis; Seismic hazard analysis, Motion estimation
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	03 Dec 2021 08:22
Last Modified:	03 Dec 2021 08:22
URI:	http://eprints.iisc.ac.in/id/eprint/70181

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