Estimation of Deterministic Seismic Hazard for Saharsa and Adjoining Region

This study presents a comprehensive estimation of the bedrock level deterministic seismic hazard for Saharsa and its adjoining region in Bihar, India, a seismically active area situated near the Himalayan seismic belt. The analysis incorporates a deterministic seismic hazard assessment approach, identifying potential seismic sources within about 300 km radius and evaluating their maximum credible earthquake potential based on historical and instrumental seismicity data, regional geology and tectonic features. Ground motion parameters including peak ground acceleration, are computed using regionally appropriate ground motion prediction equations. The results reveal spatial variability in seismic hazard levels, with higher hazard concentrations near active fault zones and tectonic lineaments. The estimated peak ground acceleration values at bedrock level provide critical inputs for earthquake-resistant design and urban planning in the region. This study aims to aid policymakers, engineers and urban planners in implementing effective seismic risk mitigation strategies, enhancing regional resilience to future seismic events.