CHAPTER - 1 INTRODUCTION 1.1. GENERAL The feasibility of a potentially damaging phenomenon occurring within a specified span of time and within a given area is termed as a natural hazard. When the human societies, living things and built environment are troubled by any of the natural hazards, then it is considered as a disaster. Earthquakes are the most horrific natural disaster without leaving much scope for prevention of hazard after the occurrence of the event especially because of its inherent