Abstract

North East India is a highly seismically active zone of India due to the collision tectonics between the Indian and the Eurasian plate in the north and subduction tectonics along the Indo-Myanmar range (IMR) in the east. It is utmost important to investigate the seismicity of this region along with uniform hazard spectra (UHS). In this paper, seismic hazard study has been performed at the Silchar district headquarters of Assam state, located in North East India. The earthquake data have been collected from various agencies from 1762 to 2020 and the fault data has been collected from seismotectonic atlas (SEISAT). Earthquake and fault data are superimposed on the Northeast India map using MapInfo software. The fault zone is defined based upon the earthquake’s density near the fault. Seismicity parameters and maximum magnitude have been estimated using Gutenberg-Richter (G-R) relationship. The best-fitted ground motion equation is considered. The outcome is represented in terms of controlling source, seismic hazard curve and UHS for Silchar city with varying ground motions. Finally, the results are presented as PGA based upon DSHA and PSHA methods. The effect of Importance Factor (I) and Response reduction factor (R) have been investigated by comparing UHS with IS: 1893-2016 code response spectra.

Details

Title
Seismic hazard analysis of Silchar city located in North East India
Author
Kumar, Aman 1 ; Ghosh, Goutam 1 ; Gupta, Praveen Kumar 2 ; Kumar, Virendra 3 ; Prabhu Paramasivam 4 

 Department of Civil Engineering, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, U.P., India 
 Department of Civil Engineering, GLA University, Mathura, U.P., India 
 Department of Mechanical Engineering, Harcourt Butler Technical University, Kanpur, U.P., India 
 Department of Mechanical Engineering, Mattu University, Mettu, Ethiopia 
Publication year
2023
Publication date
Dec 2023
Publisher
Taylor & Francis Ltd.
ISSN
19475705
e-ISSN
19475713
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2902803408
Copyright
© 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This work is licensed under the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.