DSHA Based Estimation of Peak Ground Acceleration for Madhubani and Supaul Districts Near Bihar–Nepal Region

Abstract

The districts of Madhubani and Supaul lie near Bihar–Nepal border along foothills of Himalaya. Different attenuation relationships applicable for the Himalayan region have been used to estimate the site-specific Peak Ground Acceleration (PGA) for the Madhubani and Supaul region on the basis of Deterministic Seismic Hazard Assessment (DSHA) study. Seismicity data have been collected from IMD, New Delhi and forty seismotectonic sources were recognized in the region from Seismotectonic Atlas of India (GSI in Seismotectonic atlas of India and its environs, Geological Survey of India, Kolkata, 2000). Hypocentral distances have been measured using ArcGIS software. Maximum Peak ground acceleration value is found to occur for Main Central Thrust fault for both these districts.