EQ RISK IN KANGRA SSZ

Abstract

This report contains details of methodology for earthquake risk assessment of seismic zones and hazard assessment of Kangra Seismic Zone, which is one of the most concerned topics in India. Seismic Hazard assessment is broadly conducted by two methods. They are Deterministic seismic hazard analysis (DSHA) and Probabilistic seismic hazard analysis (PSHA). Both methods provide hazard in terms of Peak Ground Acceleration (PGA). In this study Deterministic Seismic Hazard assessment has been used to determine the Peak Ground Acceleration (PGA) for the study area using Abrahamson and Lithehiser (1989), Sharma (2000) attenuation relationship. Peak Ground Acceleration is used for the assessment of risk in the Kangra Seismogenic Source Zone (Kangra SSZ) using SeisVARA software. Population data and building inventory data are collected from census 2011. And building inventory data is further classified into 34 classes according to Modal Building Types (MBTs) based on constructing material. Floor area for each building is calculated by collecting data from sources like Municipal Corporation Kangra, Public Work Department (PWD) Kangra etc. Socioeconomic clustering as per (Parsad et al., 2009) is used to do the exposure analysis of study area. The collected data is then input into the SeisVARA software and risk in terms of social loss and economic loss in Kangra SSZ is calculated.