A "blast wave" is a powerful wave of pressure that travels outward from an explosion. It is created when a sudden release of energy, such as from a bomb or a volcanic eruption, displaces air and generates a shock wave. This wave can cause significant damage to structures and can be lethal to living beings within its range. The intensity of a blast wave decreases with distance from the explosion. Factors such as the type of explosive material, the environment, and the presence of obstacles can influence its strength and effects. Understanding blast waves is crucial in fields like military defense, disaster response, and engineering.