What is defined as a subsequent explosion resulting from an initial explosion?

A subsequent explosion that occurs as a result of an initial explosion is classified as a secondary explosion. This terminology is critical in fire and explosion investigations, as it helps distinguish between the original explosive event and any subsequent events that may occur due to the initial blast.

Secondary explosions often happen when the initial explosion disrupts materials or structures that then lead to another explosive reaction. For example, the initial explosion could ignite flammable gases, causing them to explode moments later, which would be considered a secondary explosion. Understanding this concept is essential for investigators when analyzing the effects and dynamics of explosions at a scene.

The other options do not correctly define this phenomenon. A primary explosion refers to the initial blast itself. A follow-up blast might suggest a similar idea but lacks the precise terminology used within fire investigation contexts. Delayed detonation, while implying a timing aspect, does not inherently connect to the cause-and-effect relationship described in the context of subsequent explosions. This distinction is vital for thorough and accurate investigations into explosive incidents.