Which of the following describes a nonseated explosion?

A nonseated explosion is characterized by dispersed fuels that create a moderate pressure rise during the explosion event. This type of explosion occurs when an explosive mixture of fuel and air is not contained in a confined space, which results in a less intense explosion compared to seated explosions, where the pressure builds up significantly within a confined area.

In the case of nonseated explosions, the dispersion of fuels allows for a more scattered pattern of combustion, leading to lower peak pressures and a broader area of effect. This behavior is crucial to understanding the dynamics of explosions in various environments and is a key factor in fire investigations when determining the nature and cause of an explosion. Understanding the characteristics of nonseated explosions helps investigators assess the potential hazards and impacts of flammable materials in real-world scenarios.