This chart is a top-view break down of an explosion. The red portion is the primary blast area which is the zone where immediate blast wave injuries occur. The secondary blast area is where injuries caused by missiles from the blast. The tertiary blast area are injuries caused by being thrown against a solid object.
Translated into Telugu by <a href="//commons.wikimedia.org/wiki/User:Mekala_Harika" title="User:Mekala Harika">User:Mekala Harika</a>
2019-02-25
<a href="//commons.wikimedia.org/wiki/File:Anatomy_of_a_Blast.svg" title="File:Anatomy of a Blast.svg">File:Anatomy of a Blast.svg</a>, by <a href="//commons.wikimedia.org/wiki/User:Peter.C" title="User:Peter.C">User:Peter.C</a>