This book presents the concepts, procedures, and code provisions that are currently being used to make structures as earthquake resistant as is presently feasible. The book begins by describing the purpose, main aspects, and historical development of earthquake engineering and provides an overview of the type and extent of damage an earthquake can produce. It then introduces the concepts of seismology, the mechanisms of earthquake generation and propagation, and the difference between the various scales used to quantify the size of an earthquake and its potential to cause damage. The book also discusses the response spectrum and the different ways earthquake ground motions may be characterized and how local soil conditions may affect ground motion characteristics. Later chapters examine the design spectrum, conventional methods used to calculate the response of structures, soil-structure systems, and non-structural components to earthquake ground motions. This comprehensive resource is certain to advance the knowledge of those tasked with taking pre-emptive action against the devastating effects of major, catastrophic earthquakes.