Seismic Site Amplification Assessment in Bangladesh from Regional and Teleseismic Earthquake Records
DOI:
https://doi.org/10.64862/Keywords:
Site Amplification, Earthquake Ground Motion, Peak ground Accleration, Spectral Accleration, Earthquake SeismogramAbstract
Seismic ground motion in Bangladesh is strongly affected by local soil conditions, leading to seismic site amplification. This study estimates amplification effects from regional and teleseismic earthquakes (0.1–20 Hz) at 11 seismic stations across the Bengal Basin. Using earthquake data (M 6.0–7.5; depth 8–112 km; distance 333–1450 km) recorded from 2008–2015, peak ground acceleration (PGA), spectral acceleration (SA), and Fourier amplitude spectrum (FAS) were analyzed. Results show significant amplification at long periods (0.06–2.6 Hz), posing risks to tall buildings. These findings provide essential insights for seismic hazard assessment and infrastructure design in Bangladesh.
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