Seismic source modeling and probabilistic seismic hazard analysis for Bangladesh

Md. Zillur Rahman, Sumi Siddiqua () and A. S. M. Maksud Kamal
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Md. Zillur Rahman: University of British Columbia, Okanagan Campus
Sumi Siddiqua: University of British Columbia, Okanagan Campus
A. S. M. Maksud Kamal: University of Dhaka

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2020, vol. 103, issue 2, No 42, 2489-2532

Abstract: Abstract The probabilistic seismic hazard analysis (PSHA) has been performed for Bangladesh using background seismicity, crustal fault, and subduction zone source models. The latest ground motion prediction equations (GMPEs) that are developed using global data sets have been used to estimate ground motion. The uncertainties in seismic sources and GMPEs to estimate ground motion are accounted using the logic tree approach. The activity rates of the background and regional seismicity sources are estimated using a declustered and complete catalog of the study regions. The activity rates of the crustal fault and subduction zone sources are estimated from the geodetic strain rates using the well-accepted relationships. The peak ground acceleration (PGA) and spectral acceleration (SA) at spectral periods of 0.2, 0.5, 1.0, 2.0, 5.0, and 10.0 s have been estimated at a grid size of 0.250 at the bedrock ground condition. The PGA and SA maps of various spectral periods have been prepared for Bangladesh for both 10% and 2% probability of exceedance in 50 years. These seismic hazard maps can be used for seismic risk management of Bangladesh.

Keywords: Seismic source model; Probabilistic seismic hazard analysis (PSHA); Peak ground acceleration (PGA); Spectral acceleration (SA); Seismic hazard map; Bangladesh (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1007/s11069-020-04094-6

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