Seismic analysis is a field of study that focuses on analyzing the effects of earthquakes and other seismic events on structures, infrastructure, and the earth's crust. It involves studying the behavior of buildings, bridges, dams, and other structures under seismic loading, as well as assessing the potential risks and damages caused by earthquakes. Seismic analysis is used to design and retrofit structures to withstand seismic forces, and to develop strategies for disaster management and emergency response in earthquake-prone areas. It typically involves a combination of numerical modeling, experimental testing, and field investigations to evaluate the seismic performance of structures and assess the overall seismic hazard in a given region.